Sludge concentration device

Abstract

The invention relates to the technical field of sludge treatment, and discloses a sludge concentration device which comprises a base, a fixing frame is fixedly connected to the base, a conical barrel is fixedly connected to the fixing frame, a rotating cone is arranged in the conical barrel, the outer wall of the rotating cone is parallel to the inner wall of the conical barrel, and a water collecting cavity is formed in the rotating cone. A plurality of sets of evenly-distributed filtering holes are formed in the inner wall of the water collecting cavity, and a plurality of sets of circumferentially-distributed spiral material guiding cutters are fixedly connected to the outer wall of the rotating cone. Meanwhile, slurry is pressurized and injected between the outer wall of the rotating cone and the inner wall of the conical barrel along the feeding opening through the pressurized feeding assembly, then vacuum pumping is conducted on the water collecting cavity through the vacuum pumping assembly, large pressure difference is generated in the filtering holes, and therefore rapid pressurized dewatering of the sludge is achieved, and the device is simple in structure, low in operation cost and suitable for popularization and application. And the practicability of the equipment is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sludge treatment, in particular to a sludge concentrating device. Background Art

[0002] At present, sludge dewatering devices are mostly used in the sewage treatment process to separate the mud and clean water in the residual sludge. The sludge dewatering device is mainly composed of a stirring and modulating tank and a sludge dewatering machine. The working principle of the sludge dewatering device is to add flocculant polyacrylamide to the residual sludge (water content is about 99.6%) produced after the sewage is biochemically treated, and then mixed in the stirring and modulating tank, and then enter the sludge dewatering machine for flocculation and dehydration. The sludge dewatering machine separates the water and mud in the residual sludge, and the clean water can be returned to the sewage treatment system, so as to achieve the purpose of reducing the residual sludge.

[0003] In the prior art, the most common method to reduce the volume of sludge is to reduce the water content of sludge by concentration and dehydration. There are two main methods of concentration and dehydration, namely natural drying and mechanical dehydration. Among them, natural drying mostly uses a drying bed, but the natural drying method has low drying efficiency and occupies a large area; the mechanical dehydration method mostly uses plate and frame filter presses, belt filter presses, centrifugal dehydrators, etc., but there are still problems of low dehydration efficiency and high operating costs. Summary of the invention

[0004] The object of the present invention is to provide a sludge thickening device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A sludge thickening device comprises a base, a fixing frame is fixedly connected to the base, a conical cylinder is fixedly connected to the fixing frame, a rotating cone is arranged in the conical cylinder, the outer wall of the rotating cone and the inner wall of the conical cylinder are parallel to each other, a water collecting chamber is arranged in the rotating cone, a plurality of groups of evenly distributed filtering holes are arranged on the inner wall of the water collecting chamber, a plurality of groups of spiral guide knives distributed in a circumference are fixedly connected to the outer wall of the rotating cone, a feed port is arranged at the end with a larger diameter of the conical cylinder, a discharge port is arranged at the end with a smaller diameter of the conical cylinder, a mounting seat is fixedly connected in the discharge port, a rotating connecting cylinder is rotatably connected in the mounting seat through a bearing, a drain pipe is fixedly connected in the rotating connecting cylinder through a connecting frame, a water inlet end of the drain pipe is fixedly connected to the end with a smaller diameter of the rotating cone, and the drain pipe is connected to the water collecting chamber;

[0007] A pressurized feeding assembly is installed in the feed inlet, which is used to push the mud pressure pump into the conical cylinder;

[0008] A vacuum pumping assembly is installed on the drain pipe, which is used to vacuum the water collection chamber through the drain pipe;

[0009] The base is connected with a rotation driving assembly for driving the rotating cone to rotate.

[0010] As a further solution of the present invention: a connecting rod is fixedly connected to the outer wall of the discharge port, a mud guard is fixedly connected to the connecting rod, and the mud guard and the drain pipe rotate relatively.

[0011] As a further solution of the present invention: a discharge hopper is fixedly connected to the base, and the discharge hopper is arranged between the fender and the discharge port.

[0012] As a further solution of the present invention: the rotary drive assembly includes a rotating shaft rotatably connected in the conical cylinder, one end of the rotating shaft is fixedly connected to the other end of the rotating cone with a larger diameter, and the other end of the rotating shaft is fixedly connected to a first pulley.

[0013] As a further solution of the present invention: an electric motor is fixedly connected to the base, a second pulley is fixedly connected to the output shaft of the electric motor, and a transmission belt is connected between the first pulley and the second pulley.

[0014] As a further solution of the present invention: the pressurized feeding assembly includes a pressing cylinder fixedly connected to the feed port, a feeding cylinder is fixedly connected to the pressing cylinder, a lower hopper is fixedly connected to the feeding cylinder, the diameter of the pressing cylinder is smaller than that of the feeding cylinder, and a group of piston plates are slidably connected between the pressing cylinder and the feeding cylinder.

[0015] As a further solution of the present invention: a fixing seat is fixedly connected inside the feeding hopper, a telescopic pump is fixedly connected to the fixing seat, and an output shaft of the telescopic pump is fixedly connected to the piston plate.

[0016] As a further solution of the present invention: the vacuum pump suction assembly includes a rotating sealing head fixedly connected to the water outlet end of the drain pipe, a fixing rod fixedly connected to the base, a sealing connection seat fixedly connected to the fixing rod, the rotating sealing head and the sealing connection seat are relatively rotatably sealed and connected, a mounting frame fixedly connected to the base, a vacuum pump fixedly connected to the mounting frame, and a connecting pipe is connected between the water inlet end of the vacuum pump and the sealing connection seat.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention firstly rotates and extrude the sludge by means of the setting of the rotating cone and the conical cylinder, and at the same time, the sludge is pressurized and injected into the space between the outer wall of the rotating cone and the inner wall of the conical cylinder along the feed port through the pressurized feeding component, and then the water collecting chamber is vacuum pumped by the vacuum pump suction component, thereby generating a large pressure difference in the filter hole, thereby realizing rapid pressurized dehydration of the sludge, and the present invention has a simple structure, low operating cost, and improves the practicability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a schematic diagram of the structure of a sludge thickening device in the present invention.

[0019] Figure 2 It is a schematic diagram of the structure of a sludge thickening device in the present invention.

[0020] Figure 3 The figure is a schematic diagram of the internal structure of a conical cylinder in a sludge thickening device in the present invention.

[0021] Figure 4 It is a cross-sectional view of a sludge thickening device in the present invention.

[0022] In the figure: 1-base, 2-fixed frame, 3-conical cylinder, 4-feed port, 5-discharge port, 6-rotating cone, 7-rotating shaft, 8-mounting seat, 9-rotating connecting cylinder, 10-drain pipe, 11-water collecting chamber, 12-spiral guide knife, 13-filter hole, 14-fixed rod, 15-sealed connecting seat, 16-sealed rotating head, 17-mounting frame, 18-vacuum pump, 19-connecting pipe, 20-connecting rod, 21-fender, 22-discharge hopper, 23-first pulley, 24-motor, 25-second pulley, 26-transmission belt, 27-pressing cylinder, 28-feeding cylinder, 29-lower hopper, 30-fixed seat, 31-telescopic pump, 32-piston plate. DETAILED DESCRIPTION

[0023] 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 described embodiments 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 creative work are within the scope of protection of the present invention. The present invention will be described in detail with reference to the drawings and in combination with the embodiments.

[0024] In one embodiment of the present invention, see Figure 1 to Figure 4 A sludge thickening device comprises a base 1, a fixing frame 2 is fixedly connected to the base 1, a conical cylinder 3 is fixedly connected to the fixing frame 2, a rotating cone 6 is arranged in the conical cylinder 3, the outer wall of the rotating cone 6 is parallel to the inner wall of the conical cylinder 3, a water collecting chamber 11 is arranged in the rotating cone 6, a plurality of groups of evenly distributed filtering holes 13 are arranged on the inner wall of the water collecting chamber 11, a plurality of groups of spiral guide knives 12 distributed in a circumference are fixedly connected to the outer wall of the rotating cone 6, a feed port 4 is arranged at the end with a larger diameter of the conical cylinder 3, a discharge port 5 is arranged at the end with a smaller diameter of the conical cylinder 3, a mounting seat 8 is fixedly connected in the discharge port 5, a rotating connecting cylinder 9 is rotatably connected in the mounting seat 8 through a bearing, a drain pipe 10 is fixedly connected in the rotating connecting cylinder 9 through a connecting frame, a water inlet end of the drain pipe 10 is fixedly connected to the end with a smaller diameter of the rotating cone 6, and the drain pipe 10 is communicated with the water collecting chamber 11;

[0025] A pressurized feeding assembly is installed in the feed port 4, which is used to push the mud pressure pump into the conical cylinder 3; a vacuum pump suction assembly is installed on the drain pipe 10, which is used to vacuum the water collection chamber 11 through the drain pipe 10; a rotating drive assembly is connected to the base 1, which is used to drive the rotating cone 6 to rotate;

[0026] The present invention first drives the rotating cone 6 to rotate through a rotating drive component, and the rotating cone 6 drives the spiral guide knife 12 to rotate, and at the same time, the mud is pressurized and injected into the space between the outer wall of the rotating cone 6 and the inner wall of the conical cylinder 3 along the feed port 4 through the pressurized feeding component. At this time, the mud moves from the end with a larger diameter to the end with a smaller diameter driven by the spiral guide knife 12. In this process, the closer to the discharge port 5, the smaller the diameter of the rotating cone 6 and the conical cylinder 3, that is, the closer to the discharge port 5, the smaller the space, and the mud will be compressed in this process. At the same time, the water collection chamber 11 is vacuum-sucked by the vacuum pump suction component, and then a negative pressure is generated in the water collection chamber 11. At this time, a large pressure difference is generated on both sides of the filter hole 13, and then the water in the mud is pressurized along the filter hole 13 into the filter paper water collection chamber 11 through the pressure difference, and then discharged along the drain pipe 10 by the suction of the vacuum pump suction component, and the remaining sludge is discharged along the discharge port 5.

[0027] In one case of this embodiment, see Figure 1 to Figure 4 A connecting rod 20 is fixedly connected to the outer wall of the discharge port 5, and a mud guard 21 is fixedly connected to the connecting rod 20. The mud guard 21 and the drain pipe 10 rotate relatively. The present invention installs and fixes the mud guard 21 by setting the connecting rod 20. When the sludge is discharged along the discharge port 5, the sludge adheres to the outer wall of the drain pipe 10 under the action of pressure. At this time, the sludge attached to the outer wall of the drain pipe 10 can be intercepted and crushed by setting the mud guard 21.

[0028] In one case of this embodiment, see Figure 1 to Figure 4 A discharge hopper 22 is fixedly connected to the base 1 , and the discharge hopper 22 is arranged between the fender 21 and the discharge port 5 . The sludge left at the discharge port 5 falls into the discharge hopper 22 under the action of gravity, and then is discharged along the discharge hopper 22 .

[0029] In one case of this embodiment, see Figure 1 to Figure 4The rotary drive assembly includes a rotating shaft 7 rotatably connected to the conical cylinder 3, one end of the rotating shaft 7 is fixedly connected to the other end of the rotating cone 6 with a larger diameter, the other end of the rotating shaft 7 is fixedly connected to a first pulley 23, a motor 24 is fixedly connected to the base 1, a second pulley 25 is fixedly connected to the output shaft of the motor 24, a transmission belt 26 is connected between the first pulley 23 and the second pulley 25, the rotary drive assembly drives the second pulley 25 to rotate through the motor 24, the second pulley 25 drives the first pulley 23 to rotate through the transmission belt 26, the first pulley 23 drives the rotating shaft 7 to rotate, and the rotating shaft 7 drives the rotating cone 6 to rotate.

[0030] In one case of this embodiment, see Figure 1 to Figure 4 The pressurized feeding assembly includes a pressing barrel 27 fixedly connected to the feed port 4, a feeding barrel 28 fixedly connected to the pressing barrel 27, a lower hopper 29 fixedly connected to the feeding barrel 28, the diameter of the pressing barrel 27 is smaller than the feeding barrel 28, a group of piston plates 32 are slidably connected between the pressing barrel 27 and the feeding barrel 28, a fixed seat 30 is fixedly connected in the feeding hopper, a telescopic pump 31 is fixedly connected to the fixed seat 30, the output shaft of the telescopic pump 31 is fixedly connected to the piston plate 32, the pressurized feeding assembly drives the piston plate 32 to alternately rise and fall and slide between the pressing barrel 27 and the feeding barrel 28 through the telescopic pump 31, and when the piston plate 32 When slidingly inserted into the pressing cylinder 27, the piston plate 32 and the pressing cylinder 27 are relatively slidingly sealed, thereby pressing the mud in the pressing cylinder 27 into the conical cylinder 3, and then pressurizing the mud in the conical cylinder 3. Then, when the piston plate 32 slides into the feeding cylinder 28, negative pressure is generated in the pressing cylinder 27. Since the diameter of the pressing cylinder 27 is smaller than that of the feeding cylinder 28, there is a gap between the feeding cylinder 28 and the pressing cylinder 27. At this time, the mud in the feed hopper enters the pressing cylinder 27 along the gap between the feeding cylinder 28 and the pressing cylinder 27 under the drive of gravity and negative pressure, and then the piston plate 32 continues to press down to pressurize the mud in the pressing cylinder 27 again.

[0031] In one case of this embodiment, see Figure 1 to Figure 4The vacuum pump suction assembly includes a rotating sealing head fixedly connected to the water outlet end of the drain pipe 10, a fixing rod 14 fixedly connected to the base 1, a sealing connection seat 15 fixedly connected to the fixing rod 14, a relatively rotating and sealing connection between the rotating sealing head and the sealing connection seat 15, a mounting frame 17 fixedly connected to the base 1, a vacuum pump 18 fixedly connected to the mounting frame 17, a connecting pipe 19 connected between the water inlet end of the vacuum pump 18 and the sealing connection seat 15, the vacuum pump suction assembly is firstly connected by relatively rotating and sealing between the rotating sealing head and the sealing connection seat 15, and the relative sealing between the connecting pipe 19 and the drain pipe 10 is achieved while the connecting pipe 19 and the drain pipe 10 rotate relative to each other. At this time, the water collection chamber 11 can be vacuum-sucked by the setting of the vacuum pump 18, and the setting of the connecting pipe 19 and the drain pipe 10, thereby generating negative pressure in the water collection chamber 11.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sludge thickening device, comprising a base, characterized in that: A fixing frame is fixedly connected to the base, a conical cylinder is fixedly connected to the fixing frame, a rotating cone is arranged in the conical cylinder, the outer wall of the rotating cone and the inner wall of the conical cylinder are parallel to each other, a water collecting chamber is arranged in the rotating cone, a plurality of groups of evenly distributed filtering holes are arranged on the inner wall of the water collecting chamber, a plurality of groups of spiral guide knives distributed in a circle are fixedly connected to the outer wall of the rotating cone, a feed port is arranged at the end with a larger diameter of the conical cylinder, a discharge port is arranged at the end with a smaller diameter of the conical cylinder, a mounting seat is fixedly connected in the discharge port, a rotating connecting cylinder is rotatably connected in the mounting seat through a bearing, a drain pipe is fixedly connected in the rotating connecting cylinder through a connecting frame, a water inlet end of the drain pipe is fixedly connected to the end with a smaller diameter of the rotating cone, and the drain pipe is communicated with the water collecting chamber; A pressurized feeding assembly is installed in the feed inlet, which is used to push the mud pressure pump into the conical cylinder; A vacuum pumping assembly is installed on the drain pipe, which is used to vacuum the water collection chamber through the drain pipe; The base is connected with a rotation driving assembly for driving the rotating cone to rotate.

2. A sludge concentration device according to claim 1, characterized in that: A connecting rod is fixedly connected to the outer wall of the discharge port, a fender is fixedly connected to the connecting rod, and the fender and the drain pipe rotate relatively.

3. A sludge concentration device according to claim 2, characterized in that: A discharge hopper is fixedly connected to the base, and the discharge hopper is arranged between the fender and the discharge port.

4. A sludge concentrating device according to claim 1, characterized in that: The rotary drive assembly comprises a rotating shaft rotatably connected in the conical cylinder, one end of the rotating shaft is fixedly connected to the other end of the rotating cone with a larger diameter, and the other end of the rotating shaft is fixedly connected to a first pulley.

5. A sludge concentrating device according to claim 4, characterized in that: The base is fixedly connected with an electric motor, the output shaft of the electric motor is fixedly connected with a second pulley, and a transmission belt is connected between the first pulley and the second pulley.

6. A sludge concentrating device according to claim 1, characterized in that: The pressurized feeding assembly includes a pressure cylinder fixedly connected to the feed port, a feed cylinder fixedly connected to the pressure cylinder, a lower hopper fixedly connected to the feed cylinder, the diameter of the pressure cylinder is smaller than the feed cylinder, and a group of piston plates are slidably connected between the pressure cylinder and the feed cylinder.

7. A sludge concentrating device according to claim 6, characterized in that: A fixing seat is fixedly connected inside the feeding hopper, a telescopic pump is fixedly connected on the fixing seat, and an output shaft of the telescopic pump is fixedly connected to the piston plate.

8. The sludge concentrating device according to claim 1, characterized in that: The vacuum pump suction assembly includes a rotating sealing head fixedly connected to the water outlet end of the drain pipe, a fixing rod fixedly connected to the base, a sealing connection seat fixedly connected to the fixing rod, a relatively rotating sealing connection between the rotating sealing head and the sealing connection seat, a mounting frame fixedly connected to the base, a vacuum pump fixedly connected to the mounting frame, and a connecting pipe connected between the water inlet end of the vacuum pump and the sealing connection seat.

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