Sludge dewatering machine capable of reducing water content of sludge

Abstract

The utility model discloses a sludge dewatering machine capable of reducing the water content of sludge, which relates to the technical field of sludge treatment and comprises a stacked spiral sludge dewatering machine body, a flocculation tank and a water collecting tank, in the operation process of the stacked spiral sludge dewatering machine body, the baffle plate reciprocates in the barrel body, filtrate in the water collecting tank is pumped into the barrel body when the baffle plate is far away from the filter plate, and is filtered by the filter plate, so that the problem that the filtrate in the water collecting tank possibly contains residual solid particles or pollutants is solved; the problem that the flocculation effect of the flocculation tank is easily affected if the flocculation tank is directly utilized is solved, so that filtrate is recycled, water resources are saved, meanwhile, part of filtrate between the barrier plate and the filter plate flows into the water collecting tank through the filter holes in the process that the barrier plate is close to the filter plate, the problem that the filter holes of the filter plate are blocked can be avoided, and the flocculation effect of the flocculation tank is affected. Meanwhile, part of filtrate is repeatedly filtered, so that the filtering effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sludge treatment, in particular to a sludge dewatering machine which can reduce the water content of sludge. Background Art

[0002] Clean water needs to be added to the flocculation box of the screw stack sludge dewatering machine during use. The specific operating steps include: first, add clean water to the PAM preparation system (or PE foam barrel) and turn on the stirring device, then add flocculant powder in proportion, and stir for about 30 minutes before adding it for use. This step is an important preparation before starting the screw stack sludge dewatering machine to ensure that the flocculant and clean water are fully mixed so as to effectively promote the flocculation and dehydration of the sludge in the subsequent process. In addition, during the operation of the screw stack sludge dewatering machine, the sludge and flocculant merge to form alum flowers, which enter the dehydration body for concentration and dehydration to achieve solid-liquid separation. Therefore, adding clean water is one of the key steps to ensure the smooth progress of this process. If the filtrate produced by the screw stack sludge dewatering machine is used directly as clean water, the following problems may exist:

[0003] 1. Unstable filtrate quality: The filtrate may contain residual solid particles or pollutants, affecting the flocculation effect.

[0004] 2. Equipment maintenance issues: Direct use of unfiltered filtrate may cause dirt to accumulate inside the flocculation tank, increasing maintenance difficulty and cost.

[0005] However, the existing screw stack sludge dewatering machine lacks a filtering mechanism, and thus it is difficult to filter and recycle the filtrate generated by the screw stack sludge dewatering machine. Therefore, clean water is still required, which wastes water resources. Moreover, if the existing filtering mechanism is directly installed, both the filter screen and the filter plate are prone to clogging, which affects the subsequent filtering effect. Therefore, there is a need for a sludge dewatering machine that can utilize the driving force of the screw stack sludge dewatering machine itself to filter the filtrate and prevent the filtering mechanism from clogging during the process to recycle the filtrate, so as to avoid the problem of wasting resources. Utility Model Content

[0006] The purpose of the utility model is to provide a sludge dewatering machine which can reduce the water content of sludge, so as to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the utility model provides a sludge dewatering machine that can reduce the water content of sludge, including a screw-stacked sludge dewatering machine body, a flocculation box and a water collecting box, one side of the water collecting box is provided with a filter assembly for extracting and filtering the filtrate therein, the filter assembly includes a cylinder installed on one side of the water collecting box, one side of the cylinder is rotatably connected to a transmission shaft that is transmission-connected to one of the drive shafts of the stirring motor of the screw-stacked sludge dewatering machine body, a two-way thread is provided on the transmission shaft, a baffle plate that is threadedly connected to the inner wall of the cylinder, a one-way valve is installed on one side of the baffle plate, the inner wall of the cylinder is provided with a guide rod for guiding the baffle plate, the end of the cylinder extending to the inside of the water collecting box is provided with a filter plate, and the outer wall of the cylinder is provided with an interface.

[0008] Furthermore, a bidirectional nut is threadedly connected to the bidirectional thread, an outer wall of the bidirectional nut is connected to the blocking plate, and the blocking plate is threadedly connected to the bidirectional thread through the bidirectional nut.

[0009] Furthermore, a sealed bearing is provided between the transmission shaft and the side of the cylinder away from the main body of the screw-type sludge dewatering machine. The transmission shaft is connected to the inner ring of the sealed bearing, and the cylinder is connected to the outer ring of the sealed bearing.

[0010] Furthermore, an arc-shaped groove adapted to the guide rod is formed on the outer wall of the blocking plate, and the outer wall of the guide rod is slidably connected to the inner wall of the arc-shaped groove.

[0011] Furthermore, a fixing seat is installed at one end of the transmission shaft, and a propeller is installed on the outer wall of the fixing seat.

[0012] Furthermore, one of the driving shafts of the stirring motor of the spiral stacked sludge dewatering machine body is equipped with an active transmission wheel, and the other end of the transmission shaft is equipped with a driven transmission wheel, and a transmission belt is connected between the active transmission wheel and the driven transmission wheel.

[0013] Furthermore, the diameter of the active transmission wheel is 20 cm, and the diameter of the driven transmission wheel is 8 cm.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The filtrate after solid-liquid separation of the screw stack sludge dewatering machine body is located in the water collecting tank. During the operation of the screw stack sludge dewatering machine body, one of the driving shafts of its stirring motor drives the transmission shaft to rotate in the cylinder, so that the baffle plate moves back and forth in the cylinder. In the process of the baffle plate moving away from the filter plate, the filtrate in the water collecting tank is pumped into the cylinder and filtered through the filter plate, which solves the problem that the filtrate in the water collecting tank may contain residual solid particles or pollutants. If it is directly used, it is easy to affect the flocculation effect of the flocculation box. Therefore, the filtrate is recycled and water resources are saved. At the same time, in the process of the baffle plate approaching the filter plate, part of the filtrate between the baffle plate and the filter plate flows into the water collecting tank through the filter holes, which not only avoids the problem of clogging of the filter holes of the filter plate, but also repeatedly filters part of the filtrate, thereby improving the filtration effect.

[0016] After the water pipe is installed between the interface and the flocculation box, the filtrate in the water collecting tank is pumped into the cylinder body during the process of the barrier plate moving away from the filter plate, and then the filtrate in the lower cylinder body can be pumped into the flocculation box or the water storage tank for holding the filtered filtrate. Considering that it may be difficult to control the dosage ratio of flocculant powder when the filtered filtrate directly enters the flocculation box, it can be given priority to pump it into the water storage tank. At the same time, after the mixed liquid of flocculant and clean water in the flocculation box is completely used up, the filtered filtrate can be directly pumped into the flocculation box for timely use in subsequent flocculation, thereby improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a sludge dewatering machine that can reduce the water content of sludge in the utility model;

[0018] Figure 2 This is a schematic structural diagram of a water collecting tank in a sludge dewatering machine capable of reducing the water content of sludge in the utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of a cylinder in a sludge dewatering machine capable of reducing the water content of sludge in the utility model;

[0020] Figure 4 for Figure 1 A magnified view of the structure at point A in the middle.

[0021] In the picture:

[0022] 1. Screw-type sludge dewatering machine body; 2. Flocculation tank; 3. Water collection tank;

[0023] 4. Filter assembly; 401. Cylinder; 402. Drive shaft; 403. Bidirectional thread; 404. Blocking plate; 405. One-way valve; 406. Guide rod; 407. Filter plate; 408. Interface;

[0024] 5. Bidirectional nut; 6. Sealed bearing; 7. Fixed seat; 8. Propeller; 9. Active drive wheel; 10. Driven drive wheel; 11. Drive belt. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figures 1-4 , the utility model provides a technical solution:

[0027] See Figures 1-4 As shown, a sludge dewatering machine that can reduce the water content of sludge includes a spiral stacking sludge dewatering machine body 1, a flocculation box 2 and a water collecting box 3. A filter assembly 4 for extracting and filtering the filtrate therein is provided on one side of the water collecting box 3. The filter assembly 4 includes a barrel 401 installed on one side of the water collecting box 3. One side of the barrel 401 is rotatably connected to a transmission shaft 402 that is transmission-connected to one of the driving shafts of the stirring motor of the spiral stacking sludge dewatering machine body 1. A bidirectional thread 403 is provided on the transmission shaft 402. The bidirectional thread 403 is threadedly connected to a baffle plate 404 that is slidingly connected to the inner wall of the barrel 401. A bidirectional nut 5 is threadedly connected to the bidirectional thread 403. The outer wall of the bidirectional nut 5 is connected to the baffle plate 404. The baffle plate 404 is threadedly connected to the bidirectional thread 403 through the bidirectional nut 5. By providing the bidirectional nut 5, the The contact area between the baffle plate 404 and the two-way thread 403 ensures that the reciprocating movement of the baffle plate 404 is effective. A one-way valve 405 is installed on one side of the baffle plate 404. A guide rod 406 for guiding the baffle plate 404 is installed on the inner wall of the cylinder 401. The outer wall of the baffle plate 404 is provided with an arc-shaped groove adapted to the guide rod 406. The outer wall of the guide rod 406 is slidably connected to the inner wall of the arc-shaped groove. The movement process of the baffle plate 404 is guided by the guide rod 406 and the arc-shaped groove. A filter plate 407 is installed at one end of the cylinder 401 extending to the inside of the water collecting tank 3. An interface 408 is provided on the outer wall of the cylinder 401. The filtered water can be discharged directly through the interface 408, and the interface 408 can be externally connected to a water supply hose, thereby facilitating the collection of filtered water for supplying water to the flocculation box 2 during use;

[0028] The filtrate after solid-liquid separation of the spiral stacking sludge dewatering machine body 1 is located in the water collecting tank 3. During the operation of the spiral stacking sludge dewatering machine body 1, one of the driving shafts of the stirring motor drives the transmission shaft 402 to rotate in the cylinder 401, and utilizes the guiding effect of the guide rod 406 on the baffle plate 404 and the two-way thread 403 to make the baffle plate 404 move back and forth in the cylinder 401, and utilizes the one-way valve 405 to allow the filtrate on the left side of the baffle plate 404 to flow to the right side of the baffle plate 404 and cannot flow back, thereby in the process of the baffle plate 404 moving away from the filter plate 407 The filtrate in the water collecting tank 3 is pumped into the cylinder 401 and filtered through the filter plate 407, which solves the problem that the filtrate in the water collecting tank 3 may contain residual solid particles or pollutants. If it is directly used, it is easy to affect the flocculation effect of the flocculation box 2. Therefore, the filtrate is recycled to save water resources. At the same time, when the baffle plate 404 approaches the filter plate 407, part of the filtrate between the baffle plate 404 and the filter plate 407 flows into the water collecting tank 3 through the filter holes, which not only avoids the problem of clogging of the filter holes of the filter plate 407, but also repeatedly filters part of the filtrate, thereby improving the filtering effect.

[0029] Furthermore, a sealed bearing 6 is provided between the drive shaft 402 and the side of the cylinder 401 away from the main body 1 of the spiral sludge dewatering machine. The drive shaft 402 is connected to the inner ring of the sealed bearing 6, and the cylinder 401 is connected to the outer ring of the sealed bearing 6. By providing the sealed bearing 6, not only the stability of the drive shaft 402 during the rotation in the cylinder 401 is improved, but also the drive shaft 402 and the cylinder 401 are sealed, ensuring that the filtered water is discharged only through the interface 408.

[0030] Furthermore, a fixing seat 7 is installed at one end of the transmission shaft 402, and a propeller 8 is installed on the outer wall of the fixing seat 7; by providing the fixing seat 7, it is not only convenient to install the propeller 8 on the transmission shaft 402, but also makes the propeller 8 more stable after installation. The propeller 8 follows the rotation of the transmission shaft 402 through the fixing seat 7, thereby accelerating the flow of the filtrate between the baffle plate 404 and the filter plate 407, and making it easier for the filtrate to pass through the one-way valve 405.

[0031] See Figure 1 and Figure 4, one of the driving shafts of the stirring motor of the spiral stacked sludge dewatering machine body 1 is equipped with an active transmission wheel 9, and the other end of the transmission shaft 402 is equipped with a driven transmission wheel 10, and a transmission belt 11 is connected between the active transmission wheel 9 and the driven transmission wheel 10; the driven transmission wheel 10 follows the rotation of the active transmission wheel 9 through the transmission belt 11, so that one of the driving shafts of the stirring motor of the spiral stacked sludge dewatering machine body 1 drives the transmission shaft 402 to rotate; there is no need to increase the driving force additionally in the process of extracting and filtering the filtrate in the water collecting tank 3, which saves resources and has low cost; the diameter of the active transmission wheel 9 is 20 cm, and the diameter of the driven transmission wheel 10 is 8 cm; because the diameter of the active transmission wheel 9 is larger than the diameter of the driven transmission wheel 10, the rotation speed of the transmission shaft 402 is much lower than the rotation speed of the driving shaft of the stirring motor, so that the reciprocating movement process of the barrier plate 404 is slow, and the filtrate slowly passes through the filter plate 407, thereby ensuring the filtration effect of the filtrate.

[0032] Working principle: First, the sludge is formed into flocs through the flocculation box 2 to improve the dewatering efficiency; then it is sent into the screw stack sludge dewatering machine body 1. Under the push of the spiral shaft of the screw stack sludge dewatering machine body 1, the sludge is separated into solid and liquid through the tiny gap between the fixed ring and the movable ring to achieve concentration and dehydration, so that the water content of the sludge is reduced, and finally a drier mud cake is obtained. The specific composition structure and working principle of the screw stack sludge dewatering machine body 1 and the flocculation box 2 that can reduce the water content of the sludge are common knowledge mastered by technical personnel in the field, and will not be elaborated here.

[0033] The filtrate after solid-liquid separation of the screw stack sludge dewatering machine body 1 is located in the water collecting tank 3. During the operation of the screw stack sludge dewatering machine body 1, the driven transmission wheel 10 follows the rotation of the active transmission wheel 9 through the transmission belt 11, so that one of the driving shafts of the stirring motor of the screw stack sludge dewatering machine body 1 drives the transmission shaft 402 to rotate, and utilizes the guiding effect of the guide rod 406 on the baffle plate 404 and the bidirectional thread 403 to make the baffle plate 404 move back and forth in the cylinder 401, and utilizes the one-way valve 405 to allow the filtrate on the left side of the baffle plate 404 to flow to the right side of the baffle plate 404 and cannot flow back, and then when the baffle plate 404 is away from the filter plate During the process of 407, the filtrate in the water collecting tank 3 is pumped into the cylinder 401 and filtered through the filter plate 407, which solves the problem that the filtrate in the water collecting tank 3 may contain residual solid particles or pollutants. If it is directly used, it is easy to affect the flocculation effect of the flocculation box 2. Therefore, the filtrate is recycled, water resources are saved, and the amount of clean water in the water collecting tank 3 is reduced. At the same time, when the baffle plate 404 approaches the filter plate 407, part of the filtrate between the baffle plate 404 and the filter plate 407 flows into the water collecting tank 3 through the filter holes, which not only avoids the problem of clogging of the filter holes of the filter plate 407, but also repeatedly filters part of the filtrate, thereby improving the filtering effect.

Claims

1. A sludge dewatering machine capable of reducing the water content of sludge, comprising a screw-type sludge dewatering machine body (1), a flocculation tank (2) and a water collecting tank (3), characterized in that: A filter assembly (4) for extracting and filtering the filtrate in the water collecting tank (3) is provided on one side of the water collecting tank (3), and the filter assembly (4) includes a cylinder (401) installed on one side of the water collecting tank (3), and one side of the cylinder (401) is rotatably connected to a transmission shaft (402) that is connected to one of the drive shafts of the stirring motor of the spiral stacking sludge dewatering machine body (1), and a bidirectional thread (403) is provided on the transmission shaft (402). A baffle plate (404) is threadedly connected to the inner wall of the cylinder (401), and a one-way valve (405) is installed on one side of the baffle plate (404). A guide rod (406) for guiding the baffle plate (404) is installed on the inner wall of the cylinder (401). A filter plate (407) is installed on one end of the cylinder (401) extending to the inside of the water collecting tank (3). An interface (408) is opened on the outer wall of the cylinder (401).

2. A sludge dewatering machine capable of reducing the water content of sludge as claimed in claim 1, characterized in that: A bidirectional nut (5) is threadedly connected to the bidirectional thread (403), an outer wall of the bidirectional nut (5) is connected to a blocking plate (404), and the blocking plate (404) is threadedly connected to the bidirectional thread (403) via the bidirectional nut (5).

3. The sludge dewatering machine capable of reducing the water content of sludge according to claim 1, characterized in that: A sealed bearing (6) is provided between the transmission shaft (402) and the side of the cylinder (401) away from the spiral-stacked sludge dewatering machine body (1); the transmission shaft (402) is connected to the inner ring of the sealed bearing (6); and the cylinder (401) is connected to the outer ring of the sealed bearing (6).

4. A sludge dewatering machine capable of reducing the water content of sludge as claimed in claim 1, characterized in that: The outer wall of the blocking plate (404) is provided with an arc-shaped groove adapted to the guide rod (406), and the outer wall of the guide rod (406) is slidably connected to the inner wall of the arc-shaped groove.

5. The sludge dewatering machine capable of reducing the water content of sludge according to claim 1, characterized in that: A fixing seat (7) is installed at one end of the transmission shaft (402), and a propeller (8) is installed on the outer wall of the fixing seat (7).

6. The sludge dewatering machine capable of reducing the water content of sludge according to claim 1, characterized in that: A driving wheel (9) is installed on one of the driving shafts of the stirring motor of the spiral stacking sludge dewatering machine body (1), a driven wheel (10) is installed on the other end of the transmission shaft (402), and a transmission belt (11) is connected between the driving wheel (9) and the driven wheel (10).

7. A sludge dewatering machine capable of reducing the water content of sludge as claimed in claim 6, characterized in that: The diameter of the active transmission wheel (9) is 20 cm, and the diameter of the driven transmission wheel (10) is 8 cm.

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