Sludge dewatering and dosing device

Abstract

The utility model discloses a sludge dewatering dosing device, which relates to the technical field of sludge dosing, and particularly comprises a stirring box and a preparation tank, a plurality of supporting legs are arranged on two sides of the bottom of the stirring box, at least two stirring shafts which are annularly distributed are arranged at the bottom in the stirring box, and two ends of each stirring shaft are respectively and rotatably connected with the end part of the stirring box. A plurality of groups of stirring mechanisms which are arranged at intervals are arranged on each stirring shaft, and a gap is formed between every two adjacent groups of stirring mechanisms; a mounting beam is arranged at the top of the stirring box, a plurality of liquid conveying pipes are mounted on the mounting beam, and the lower parts of the liquid conveying pipes extend into the space. When the sludge stirring device is used, sludge flows to the other end of the stirring box along the stirring box, the sludge is continuously stirred by the stirring blades while flowing, and the liquid conveying pipe continuously sprays a coagulant, so that the coagulant can be quickly mixed together along with the stirred sludge, and the sludge flows from one end of the stirring box to the other end of the stirring box. And the coagulant and the sludge are fully stirred and mixed.

Description

Technical Field

[0001] This utility model relates to the field of sludge dosing technology, specifically a sludge dewatering dosing device. Background Technology

[0002] Sludge dewatering with chemicals is a method of treating sludge, primarily aimed at improving its dewatering performance by adding specific chemical agents. These agents include cationic polyacrylamide, polyaluminum chloride, ferric chloride, polyferric sulfate, and polyaluminum ferric chloride, which reduce the affinity between sludge and water through flocculation, altering the form in which water exists in the sludge, thereby achieving dewatering.

[0003] When dealing with large volumes of sludge, the sludge aggregates are also quite large. Adding chemicals to this aggregate requires stirring and mixing, but large volumes of sludge are difficult to stir, and existing dosing devices cannot handle high-volume production. For example, the sludge dewatering dosing device described in document CN204874254U, in paragraph

[0015] , states that the chemicals first flow into the corresponding dosing pipe 2, which directly delivers the solution to the bottom of the sludge dewatering mixer 1 for thorough mixing with the sludge. However, during operation, the sludge flows rapidly out of the bottom of the mixer, resulting in a short mixing time with the chemicals discharged from the dosing pipe 2, leading to insufficient mixing. Therefore, we propose a sludge dewatering dosing device. Utility Model Content

[0004] To address the shortcomings of existing dosing devices that cannot produce large volumes of sludge, this invention provides a sludge dewatering dosing device that allows a large amount of sludge to flow from a mixing tank and is continuously stirred and mixed during the flow, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a sludge dewatering dosing device, including a mixing tank and a preparation tank, with several support legs on both sides of the bottom of the mixing tank, and at least two ring-shaped mixing shafts at the bottom of the mixing tank, with both ends of the mixing shafts rotatably connected to the end of the mixing tank, and each mixing shaft having multiple sets of spaced mixing mechanisms, with a gap between adjacent sets of mixing mechanisms.

[0006] A mounting beam is provided at the top of the mixing tank, and multiple infusion tubes are installed on the mounting beam, with the lower part of the infusion tubes extending into the spacing.

[0007] One end of the stirring shaft is installed on the output end of the gearbox, the input end of the gearbox is connected to the drive motor, the top of the infusion pipe is connected to the delivery pipe, the delivery pipe is connected to the preparation tank, and a liquid supply pump is installed on the delivery pipe.

[0008] Preferably, a water inlet pipe is installed on one side of the mixing tank near the gearbox, and a discharge pipe is provided on the side of the mixing tank away from the gearbox.

[0009] Preferably, the water inlet pipe is located above the mixing mechanism, and the discharge pipe is spaced a certain distance from the bottom of the mixing tank.

[0010] Preferably, each stirring mechanism includes stirring blades distributed around the stirring shaft, and each stirring blade is connected to the stirring shaft via multiple connecting rods.

[0011] Preferably, the stirring blades are helical blades, and the helical blades in two adjacent stirring mechanisms rotate in opposite directions.

[0012] Preferably, the gearbox includes a housing, and the housing is provided with drive shafts in a number and position corresponding to the stirring shaft. One end of the drive shaft is rotatably mounted on the housing, and the drive shafts are respectively connected to the ends of the stirring shaft.

[0013] The first transmission gear is installed at the end of the transmission shaft away from the stirring shaft. The first transmission gears are distributed around the second transmission gear, and the second transmission gear meshes with each of the first transmission gears.

[0014] A worm gear is provided on the side of the second transmission gear away from the transmission shaft. Both the worm gear and the second transmission gear are coaxially mounted on the mounting shaft, and the two ends of the mounting shaft are rotatably connected to the housing.

[0015] A worm is engaged at the bottom of the worm gear, and both ends of the worm are rotatably connected to the housing, with one end of the worm connected to the drive motor.

[0016] Preferably, the drive motor and gearbox are both mounted on the base, the base is equipped with a control cabinet, the control cabinet contains a controller, and the surface of the control cabinet is equipped with a display and operation buttons connected to the controller.

[0017] Each infusion pipe is equipped with a flow meter, the preparation tank is equipped with a level gauge, and the delivery pipe is equipped with a solenoid valve. The solenoid valve, level gauge, flow meter, and drive motor are all connected to the controller.

[0018] Compared with the prior art, in the use of this utility model, after the external sludge flows into the mixing tank through the water inlet pipe, the sludge will flow along the mixing tank to the other end. While the sludge is flowing, it is constantly stirred by the stirring blades, and the infusion pipe continuously sprays coagulant. Therefore, the coagulant can be quickly mixed together with the stirred sludge, so that the coagulant and sludge are fully mixed as the sludge flows from one end of the mixing tank to the other end. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present utility model. Figure 1 .

[0020] Figure 2 This is a schematic diagram of the structure of the present utility model. Figure 2 .

[0021] Figure 3 This is a schematic diagram of the stirring mechanism of this utility model.

[0022] Figure 4 This is a schematic diagram of the stirring mechanism and infusion tube of this utility model.

[0023] Figure 5 This is a schematic diagram of the three-dimensional structure inside the gearbox of this utility model. Figure 1 .

[0024] Figure 6 This is a schematic diagram of the three-dimensional structure inside the gearbox of this utility model. Figure 2 .

[0025] Figure 7 This is a cross-sectional view of the internal structure of the gearbox of this utility model.

[0026] In the diagram: 1. Preparation tank; 2. Delivery pipe; 3. Mounting beam; 4. Gearbox; 5. Drive motor; 6. Support leg; 7. Mixing tank; 8. Discharge pipe; 9. Mixing shaft; 10. Infusion pipe; 11. Water inlet pipe; 12. Supply pump; 13. Connecting rod; 14. Mixing blade; 15. First transmission gear; 16. Worm gear; 17. Second transmission gear; 18. Drive shaft; 19. Mounting shaft; 20. Worm gear; 21. Base; 22. Control cabinet. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figures 1 to 7 This utility model provides a technical solution: a sludge dewatering dosing device, including a mixing tank 7 and a preparation tank 1. The preparation tank 1 is used to prepare or store the coagulant (flocculator) poured into the sludge. The bottom of the preparation tank 1 is connected to a conveying pipe 2, and a liquid supply pump 12 is provided on the conveying pipe 2. The coagulant is conveyed to the outside through the conveying pipe by the liquid supply pump 12.

[0029] The mixing tank 7 has several support legs 6 on both sides of its bottom, which are set on the ground. The mixing tank 7 also has at least two ring-shaped stirring shafts 9 at its bottom. Figure 1The mixing shafts consist of three shafts, each rotatably connected to the end of the mixing tank 7. Each shaft 9 has multiple sets of spaced-apart mixing mechanisms, with a gap between adjacent sets. Figure 3 As shown, each stirring mechanism specifically includes stirring blades 14 distributed around the stirring shaft 9, and each stirring blade 14 is connected to the stirring shaft 9 through multiple connecting rods 13. The stirring blades 14 are helical blades, and the helical blades in adjacent stirring mechanisms rotate in opposite directions.

[0030] This application also proposes a gearbox 4 capable of simultaneously driving multiple stirring shafts 9. For example... Figure 7 As shown, the specific structure of the gearbox 4 includes a housing (not labeled in the figure), within which are installed drive shafts 18 in number and position corresponding to the stirring shafts 9. That is, the number of drive shafts 18 corresponds to the number of stirring shafts 9. One end of each drive shaft 18 is rotatably mounted on the housing. Figure 1 and Figure 2 As shown, one end of the stirring shaft 9 is installed on the output end of the gearbox 4, that is, the drive shaft 18 is connected to the end of each stirring shaft 9 respectively, and the stirring shaft 9 and the drive shaft 18 are specifically connected by a coupling;

[0031] The first transmission gear 15 is installed at the end of the transmission shaft 18 away from the stirring shaft 9, such as... Figure 5 and Figure 6 As shown, the first transmission gears 15 are distributed around the second transmission gear 17, so that the first transmission gears 15 are like planets surrounding the second transmission gear 17. The second transmission gear 17 meshes with each of the first transmission gears 15, so when the second transmission gear 17 rotates, it can simultaneously drive each of the first transmission gears 15 to rotate. The first transmission gears 15 will then drive the stirring shaft 9 to rotate simultaneously through the transmission shaft 18.

[0032] A worm gear 16 is located on the side of the second transmission gear 17 away from the transmission shaft 18. Both the worm gear 16 and the second transmission gear 17 are coaxially mounted on the mounting shaft 19, and both ends of the mounting shaft 19 are rotatably connected to the housing. A worm 20 meshes with the bottom of the worm gear 16. Both ends of the worm 20 are rotatably connected to the housing, and one end of the worm 20 is connected to the drive motor 5. Specifically, the worm 20 and the drive motor 5 are connected via a coupling, that is, the drive motor 5 is connected to the input end of the gearbox 4. In use, both the drive motor 5 and the gearbox 4 are mounted on the base 21.

[0033] Specifically, when the drive motor 5 rotates, it drives the worm gear to rotate. The drive motor reduces speed through the worm gear, thereby increasing the output torque. The worm gear then drives the second transmission gear 17 to rotate. In use, the size of the second transmission gear 17 and the first transmission gear 15 can be controlled to change the transmission ratio. This allows the drive motor to reduce speed through the worm gear and then reduce speed again through the second transmission gear 17 and the first transmission gear 15.

[0034] Furthermore, a mounting beam 3 is provided at the top of the mixing tank 7, and multiple infusion pipes 10 are installed on the mounting beam 3. The infusion pipes 10 are steel pipes, such as... Figure 4 As shown, the lower part of the infusion pipe 10 extends into the gap between two adjacent sets of stirring mechanisms, and the infusion pipe 10 does not contact the stirring blades 14. A one-way spray valve is provided at the bottom of the infusion pipe 10. Figure 1 and Figure 2 As shown, the top of each infusion tube 10 is connected to the delivery tube 2, allowing the coagulant in the delivery tube 2 to flow into each infusion tube 10, and the bottom of the infusion tube 10 is placed in the sludge.

[0035] A water inlet pipe 11 is installed on one side of the mixing tank 7, near the gearbox 4, and a discharge pipe 8 is provided on the other side of the mixing tank 7, away from the gearbox 4. When external sludge flows into the mixing tank 7 through the water inlet pipe 11, the sludge will flow along the mixing tank 7 to the other end due to its elongated structure. While the sludge is flowing, it is continuously agitated by the stirring blades 14. Since there are multiple stirring blades 14 and adjacent stirring blades 14 rotate in opposite directions, the sludge passing through the stirring blades 14 can be fully agitated. Meanwhile, the infusion pipe 10 continuously sprays coagulant, so the coagulant can be quickly mixed together with the agitated sludge, allowing the coagulant and sludge to be fully mixed as the sludge flows from one end of the mixing tank to the other.

[0036] Furthermore, the water inlet pipe 11 is located above the mixing mechanism, allowing the sludge entering the mixing box to flow around the mixing shaft, preventing the sludge from flowing back into the water inlet pipe 11. Moreover, the discharge pipe 8 is spaced a certain distance from the bottom of the mixing box 7, allowing a portion of the sludge to remain in the mixing box, preventing the sludge from being discharged directly from the discharge pipe 8, causing the mixing box 7 to be emptied and the mixing blades 14 to be unable to mix.

[0037] Furthermore, such as Figure 1 As shown, a control cabinet 22 is provided on the base 21. The control cabinet 22 contains a controller, which can be a host, a PLC logic controller or a PCB control board. The surface of the control cabinet 22 is provided with a display and operation buttons connected to the controller. The operation buttons include start buttons, stop buttons, etc., and the display is a touch screen.

[0038] Each infusion tube 10 is equipped with a flow meter to monitor the flow rate of each infusion tube. The preparation tank 1 is equipped with a level gauge to monitor the liquid level in the preparation tank 1. The delivery pipe 2 is equipped with a solenoid valve. The solenoid valve, level gauge, flow meter and drive motor are respectively connected to the controller.

[0039] Based on the above embodiments, further optimization can be achieved by installing electrically controlled valves on both the discharge pipe 8 and the inlet pipe 11, with the electrically controlled valves connected to the controller.

[0040] Based on the above embodiments, further optimization can be achieved by providing a drain valve at the bottom of the mixing tank 7, which can discharge the sludge remaining in the mixing tank 7.

[0041] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. 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 an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. Moreover, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sludge dewatering dosing device, comprising a mixing tank (7) and a preparation tank (1), wherein the mixing tank (7) has several supporting legs (6) on both sides of its bottom, characterized in that, The bottom of the mixing tank (7) is provided with at least two stirring shafts (9) arranged in a ring. The two ends of the stirring shafts (9) are rotatably connected to the ends of the mixing tank (7). Each stirring shaft (9) is provided with multiple sets of stirring mechanisms arranged at intervals, and there is a gap between two adjacent sets of stirring mechanisms. A mounting beam (3) is provided on the top of the mixing tank (7), and multiple infusion tubes (10) are installed on the mounting beam (3), with the lower part of the infusion tubes (10) extending into the spacing; One end of the stirring shaft (9) is installed on the output end of the gearbox (4). The input end of the gearbox (4) is connected to the drive motor (5). The top of the infusion pipe (10) is connected to the delivery pipe (2). The delivery pipe (2) is connected to the preparation tank (1). A liquid supply pump (12) is provided on the delivery pipe (2).

2. The sludge dewatering and dosing device according to claim 1, characterized in that, A water inlet pipe (11) is installed on one side of the mixing tank (7) near the gearbox (4), and a discharge pipe (8) is provided on the other side of the mixing tank (7) away from the gearbox (4).

3. The sludge dewatering and dosing device according to claim 2, characterized in that, The water inlet pipe (11) is located above the stirring mechanism, and the discharge pipe (8) is spaced a certain distance from the bottom of the mixing tank (7).

4. The sludge dewatering and dosing device according to claim 3, characterized in that, Each stirring mechanism includes stirring blades (14) distributed around the stirring shaft (9), and each stirring blade (14) is connected to the stirring shaft (9) by multiple connecting rods (13).

5. The sludge dewatering and dosing device according to claim 4, characterized in that, The stirring blade (14) is a spiral blade, and the spiral blades in two adjacent stirring mechanisms rotate in opposite directions.

6. The sludge dewatering and dosing device according to claim 1, characterized in that, The gearbox (4) includes a housing, and inside the housing are drive shafts (18) in number and position corresponding to the stirring shaft (9). One end of the drive shaft (18) is rotatably mounted on the housing, and the drive shaft (18) is connected to the end of the stirring shaft (9). The drive shaft (18) is equipped with a first drive gear (15) at the end away from the stirring shaft (9). The first drive gears (15) are distributed around the second drive gear (17), and the second drive gear (17) meshes with each of the first drive gears (15). The second transmission gear (17) has a worm gear (16) on the side away from the transmission shaft (18). The worm gear (16) and the second transmission gear (17) are both coaxially mounted on the mounting shaft (19). The two ends of the mounting shaft (19) are rotatably connected to the housing. A worm (20) is engaged at the bottom of the worm wheel (16). Both ends of the worm (20) are rotatably connected to the housing, and one end of the worm (20) is connected to the drive motor (5).

7. The sludge dewatering and chemical dosing device according to any one of claims 1-6, characterized in that, The drive motor (5) and gearbox (4) are both mounted on the base (21). The base (21) is equipped with a control cabinet (22). The control cabinet (22) contains a controller. The surface of the control cabinet (22) is equipped with a display and operation buttons connected to the controller. Each infusion pipe (10) is equipped with a flow meter, the preparation tank (1) is equipped with a level gauge, and the delivery pipe (2) is equipped with a solenoid valve. The solenoid valve, level gauge, flow meter and drive motor are respectively connected to the controller.

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