Stirring type sludge drying machine

Abstract

The invention discloses a stirring type sludge drying machine which comprises a rotating shaft; the stirring blades are coaxially and fixedly arranged on the rotating shaft; the fan-shaped plates are fixedly distributed on the rotating shaft at equal intervals and are staggered with the neutral gear areas of the stirring blades; the fan-shaped groove is formed in the fan-shaped plate, and openings are formed in the two sides of the fan-shaped The drainage plate is obliquely arranged in the fan-shaped groove; and when the driving rotating shaft rotates, the sludge in the low-viscosity area in the fan-shaped groove is pushed under the inclination angle of the drainage plate to move towards the blank area to fill the blank area. Sludge in a low-viscosity area is forcibly drained to a blank area formed by less sludge distribution through power of the drainage plate for filling, so that the problem of non-uniform distribution of the sludge in the drying machine due to too high heating rate is effectively solved, and the phenomenon of local overheating or too high water content is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of sludge treatment devices, and particularly to a stirring type sludge dryer. Background Art

[0002] A sludge dryer is an indirectly heated low-speed stirring type drying device. Such devices usually rotate to turn over the sludge, making it fully contact with the heat medium (such as hot air, steam), so as to achieve drying.

[0003] When the sludge dryer dries the sludge, the sludge viscosity decreases exponentially with the increase of temperature (for example, the viscosity is 10 4 mPa·s at 30°C and drops to 10 2 mPa·s at 100°C). If the heating rate > 5°C / min, it will cause the material viscosity gradient in the same cross-section > 50%. The material in the low-viscosity area is quickly thrown to the cylinder wall (centrifugal speed 0.5 - 1 m / s), while the high-viscosity area stays in the center, forming a "wall - center" viscosity stratification, resulting in too little sludge distribution and forming blank areas. And the viscosity stratification causes uneven distribution of the sludge in the dryer, leading to local overheating or too high water content. Summary of the Invention

[0004] The purpose of the present invention is to provide a stirring type sludge dryer. For the drying method of the dryer with a heating rate > 5°C / min, it is adopted to forcibly drain the low-viscosity area to fill the blank area between the "wall - center" viscosity stratifications.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A stirring type sludge dryer, comprising:

[0007] A rotating shaft;

[0008] Stirring blades, coaxially and fixedly arranged on the rotating shaft;

[0009] Sector plates, fixedly and equally distributed on the rotating shaft, arranged staggeredly with the empty areas of the stirring blades;

[0010] Sector grooves, opened in the sector plates, with openings on both sides;

[0011] Drainage plates, inclinedly arranged inside the sector grooves;

[0012] Wherein, when the rotating shaft is driven to rotate, the sludge in the low-viscosity area inside the sector groove is pushed under the inclination angle of the drainage plate and moves to fill the blank area.

[0013] Preferably, a fixed shaft is fixedly connected inside the sector-shaped groove. The drainage plate is provided with a shaft groove adapted to the fixed shaft. The fixed shaft is snapped into the shaft groove so that one end of the drainage plate is rotatably connected to the sector-shaped plate. A torsion spring is arranged in the shaft groove, and both ends of the torsion spring are connected to the shaft groove and the fixed shaft respectively. The other end of the drainage plate is connected to the sector-shaped plate through a lead wire. The inclination angle of the drainage plate itself in the sector-shaped groove is controlled by adjusting the length of the lead wire.

[0014] Preferably, the sector-shaped plate is provided with a threaded groove, and a threaded rod is threadedly connected to the threaded groove. The threaded rod has an annular protrusion for partitioning, so that the threaded rod is divided into upper and lower parts. The upper part is connected to the lead wire and the lead wire is wound around the upper part of the threaded rod in a winding manner. The lower part is a threaded section and is threadedly connected to the threaded groove.

[0015] Preferably, a plurality of ejection components are arranged on one side of the drainage plate facing the blank area, and a plurality of absorption components are arranged on the side of the drainage plate facing away from the blank area. Both the ejection components and the absorption components are one-way flow components, and a slidable sealing plate is arranged inside the drainage plate.

[0016] Preferably, a receiving groove is formed inside the drainage plate. Two partition plates are fixedly connected to the middle part of the receiving groove, dividing the receiving groove into upper, middle and lower parts. The sealing plate is slidably and sealingly arranged in the middle part, and the partition plates are provided with through openings to communicate the upper, middle and lower parts.

[0017] Preferably, the ejection components are arranged in the upper part of the receiving groove and include:

[0018] A first end cap;

[0019] A first connecting ring, fixedly connected coaxially with the first end cap;

[0020] A first communicating cylinder, arranged inside the drainage plate and fixedly connected to the drainage plate, having a plurality of openings;

[0021] A first support ring, fixedly connected coaxially with the first communicating cylinder;

[0022] A first tension spring, one end of which is connected to the first end cap and the other end is connected to the first communicating cylinder;

[0023] Wherein, the first support ring is slidably connected with the first connecting ring, and the drainage plate is provided with a plurality of ejection holes.

[0024] Preferably, the absorption components are arranged in the lower part of the receiving groove and include:

[0025] A second end cap;

[0026] A second connecting ring, fixedly connected coaxially with the second end cap;

[0027] A second communicating cylinder, arranged inside the drainage plate and fixedly connected to the drainage plate, having a plurality of openings;

[0028] A second supporting ring is coaxially fixedly connected to the second interconnecting tube;

[0029] A first compression spring, one end of which is connected to the second end cover, and the other end of which is connected to the second interconnecting cylinder;

[0030] The second supporting ring is slidably connected to the second connecting ring, and the guide plate is provided with a plurality of suction holes.

[0031] Preferably, a first connecting plate is fixedly connected inside the rotating shaft, and a second connecting plate is fixedly connected outside the rotating shaft. The first connecting plate and the second connecting plate are connected by a main wire, and the main wire is arranged to coincide with the virtual center axis of the rotating shaft. A plurality of contact protrusions are also fixedly connected inside the rotating shaft, and the contact protrusions are provided with grooves. Branch wires extend from the main wire, and the branch wires pass through the rotating shaft and extend in the fan-shaped plate, and pass through the fixed shaft and the guide plate in turn, and are connected to the sealing plate. The main wire and the branch wire are both made of silicone rubber, TPE or polyester TPEE, and the sealing plate is also pulled in the opposite direction to the branch wire by the setting of a second tension spring.

[0032] Preferably, the agitated sludge dryer further comprises a gear motor, a material inlet, a solid outlet, a steam outlet, a heating medium inlet, a heating medium outlet and a heat exchange jacket.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The present invention effectively solves the problem of uneven sludge distribution in the dryer caused by too fast heating rate by forcibly draining the sludge in the low viscosity area through the drainage plate to fill the blank area formed by too little sludge distribution, avoiding local overheating or excessive moisture content. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic structural diagram of a stirring sludge dryer proposed by the present invention;

[0036] Figure 2 This is a schematic diagram of the connection structure between one of the fan-shaped plates and the rotating shaft in a stirring sludge dryer proposed by the present invention;

[0037] Figure 3 This is a schematic diagram of the internal structure of a stirring sludge dryer proposed by the present invention;

[0038] Figure 4 A schematic diagram of the position structure of a stirring sludge dryer in which one of the contact protrusions is located inside the rotating shaft and between the rotating shaft;

[0039] Figure 5 This is a schematic diagram of the structure of a drainage plate inside a fan-shaped plate in a stirring sludge dryer proposed by the present invention;

[0040] Figure 6 Schematic diagram of the internal structure decomposition of the diversion plate in a stirring type sludge dryer proposed by the present invention;

[0041] Figure 7 is Figure 6 The enlarged structure diagram at position A in

[0042] In the figure: 1, rotating shaft; 2, stirring paddle; 3, sector plate; 4, sector groove; 5, diversion plate; 6, fixed shaft; 7, shaft groove; 8, torsion spring; 9, lead wire; 10, thread groove; 11, threaded rod; 12, annular protrusion; 13, receiving groove; 14, partition plate; 15, sealing plate; 16, first end cover; 17, first connecting ring; 18, first intercommunicating cylinder; 19, first support ring; 20, first tension spring; 21, ejection hole; 22, second end cover; 23, second connecting ring; 24, second intercommunicating cylinder; 25, second support ring; 26, first compression spring; 27, suction hole; 28, first connecting plate; 29, second connecting plate; 30, main wire; 31, contact protrusion; 32, groove; 33, branch wire; 34, gear motor; 35, material inlet; 36, solid outlet; 37, steam outlet; 38, heating medium inlet; 39, heating medium outlet; 40, heat exchange jacket; 41, through port; 42, second tension spring. Detailed implementation manners

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0044] A stirring type sludge dryer includes:

[0045] Rotating shaft 1;

[0046] Stirring paddle 2, coaxially and fixedly arranged on the rotating shaft 1;

[0047] Sector plates 3, fixedly and equally distributed on the rotating shaft 1, staggered with the empty areas of the stirring paddles 2;

[0048] Sector grooves 4, opened in the sector plates 3, with openings on both sides;

[0049] Diversion plates 5, inclinedly arranged inside the sector grooves 4;

[0050] Among them, when the rotating shaft 1 is driven to rotate, the low-viscosity sludge located inside the sector groove 4 is pushed under the inclination angle of the diversion plate 5 and moves to the blank area to fill it.

[0051] Through the above technical solution, the sludge in the low-viscosity area is forced to flow through the drainage plate 5 to the blank area where the sludge distribution is too small for filling, effectively solving the problem of uneven distribution of sludge in the dryer caused by too fast heating rate, and avoiding the phenomena of local overheating or too high moisture content.

[0052] A fixed shaft 6 is fixedly connected inside the fan-shaped groove 4. The drainage plate 5 is provided with a shaft groove 7 adapted to the fixed shaft 6. The fixed shaft 6 is inserted into the shaft groove 7 so that one end of the drainage plate 5 is rotatably connected to the fan-shaped plate 3. A torsion spring 8 is arranged in the shaft groove 7. The two ends of the torsion spring 8 are respectively connected to the shaft groove 7 and the fixed shaft 6. The other end of the drainage plate 5 is connected to the fan-shaped plate 3 through a lead wire 9. The inclination angle of the drainage plate 5 itself in the fan-shaped groove 4 is controlled by adjusting the length of the lead wire 9.

[0053] Through the above technical solution, the angle of the drainage plate 5 inside the fan-shaped groove 4 can be effectively adjusted, and the sludge in the low-viscosity area can be more accurately forced to flow to the blank area for filling.

[0054] The fan-shaped plate 3 is provided with a threaded groove 10. A threaded rod 11 is threadedly connected to the threaded groove 10. The threaded rod 11 has an annular protrusion 12 for separation, so that the threaded rod 11 is divided into upper and lower parts. The upper part is connected to the lead wire 9 and the lead wire 9 is wound around the upper part of the threaded rod 11 in a winding manner. The lower part is a threaded section and is threadedly connected to the threaded groove 10.

[0055] Through the above technical solution, the number of winding turns of the lead wire 9 is controlled by the rotation and rotation direction of the threaded rod 11, and then the inclination angle of the drainage plate 5 is determined by pulling the drainage plate 5 through the lead wire 9.

[0056] A plurality of ejection components are arranged on one side of the drainage plate 5 facing the blank area, and a plurality of absorption components are arranged on the side of the drainage plate 5 facing away from the blank area. Both the ejection components and the absorption components are one-way flow components. A slidable sealing plate 15 is arranged inside the drainage plate 5.

[0057] Through the above technical solution, the sliding of the sealing plate 15 is used to control the change of the pressure inside the drainage plate 5. When the pressure decreases, the sludge in the low-viscosity area is sucked into the drainage plate 5 through the absorption component, and when the pressure increases, the sludge is ejected through the ejection component to the blank area for filling.

[0058] A receiving groove 13 is formed inside the drainage plate 5. Two partition plates 14 are fixedly connected to the middle part of the receiving groove 13, dividing the receiving groove 13 into upper, middle and lower parts. The sealing plate 15 is slidably and sealingly arranged in the middle part. The partition plate 14 is provided with a through hole 41 to communicate the upper, middle and lower parts.

[0059] The ejection component is arranged in the upper part of the receiving groove 13 and includes:

[0060] The first end cover 16;

[0061] The first connecting ring 17, fixedly connected coaxially with the first end cover 16;

[0062] The first communicating cylinder 18, arranged inside the drainage plate 5 and fixedly connected with the drainage plate 5, having a plurality of openings;

[0063] The first support ring 19, fixedly connected coaxially with the first communicating cylinder 18;

[0064] The first tension spring 20, one end of which is connected to the first end cover 16 and the other end is connected to the first communicating cylinder 18;

[0065] Wherein, the first support ring 19 is slidably connected with the first connecting ring 17, and the drainage plate 5 is provided with a plurality of ejection holes 21.

[0066] The absorption assembly is arranged in the lower part of the accommodation groove 13, and includes:

[0067] The second end cover 22;

[0068] The second connecting ring 23, fixedly connected coaxially with the second end cover 22;

[0069] The second communicating cylinder 24, arranged inside the drainage plate 5 and fixedly connected with the drainage plate 5, having a plurality of openings;

[0070] The second support ring 25, fixedly connected coaxially with the second communicating cylinder 24;

[0071] The first compression spring 26, one end of which is connected to the second end cover 22 and the other end is connected to the second communicating cylinder 24;

[0072] Wherein, the second support ring 25 is slidably connected with the second connecting ring 23, and the drainage plate 5 is provided with a plurality of suction holes 27.

[0073] A first connecting plate 28 is fixedly connected inside the rotating shaft 1, a second connecting plate 29 is fixedly connected outside the rotating shaft 1, the first connecting plate 28 and the second connecting plate 29 are connected by a main wire 30, the main wire 30 is arranged to coincide with the virtual central axis of the rotating shaft 1, a plurality of contact protrusions 31 are also fixedly connected inside the rotating shaft 1, grooves 32 are provided in the contact protrusions 31, each branch wire 33 extends from the main wire 30, the branch wire 33 passes through the rotating shaft 1 and extends inside the sector plate 3, and then passes through the fixed shaft 6 and the drainage plate 5 in sequence and is connected to the sealing plate 15. The main wire 30 and the branch wires 33 are both made of silicone rubber, TPE or polyester-based TPEE materials, and the sealing plate 15 is also arranged in the opposite direction of the pulling of the branch wire 33 through the second tension spring 42.

[0074] The stirring sludge dryer further includes a gear motor 34, a material inlet 35, a solid outlet 36, a steam outlet 37, a heating medium inlet 38, a heating medium outlet 39, and a heat exchange jacket 40.

[0075] Working principle:

[0076] The gear motor 34 drives the rotating shaft 1 to rotate, and the paddle blades connected to the rotating shaft 1 rotate synchronously. The sludge to be treated is input into the dryer through the material inlet 35. At the same time, steam or hot air enters between the heat exchange jackets 40 through the heating medium inlet 38 to exchange heat with the sludge inside the dryer. The steam evaporated from the heated sludge is discharged through the steam outlet 37, and finally the granular solid sludge is discharged outside the dryer through the solid outlet 36.

[0077] During the rotation of the rotating shaft 1, the sector plate 3 rotates synchronously, pushing the sludge in the low-viscosity area close to the heat exchange jacket 40 and guiding it to the blank area for filling under the inclination angle of the diversion plate 5.

[0078] According to the different blank areas, the angle of the diversion plate 5 within the sector plate 3 can be adjusted to accurately guide the low-viscosity area sludge to the blank area for filling. Specifically:

[0079] According to the self-locking function of the threaded rod 11 and the threaded groove 10, by rotating the threaded rod 11 and operating the rotation direction, the number of turns of the lead wire 9 wound on the threaded rod 11 is determined. The lead wire 9 pulls the diversion plate 5 to determine the inclination angle of the diversion plate 5 inside the sector plate 3.

[0080] During the rotation of the rotating shaft 1, the contact protrusion 31 also rotates synchronously. After the contact protrusion 31 touches the main wire 30, it will push the main wire 30, causing the main wire 30 to deviate from the virtual central axis position of the rotating shaft 1 and causing its own elastic extension, thereby pulling each branch wire 33. Then, by pulling each branch wire 33, the sealing plate 15 is pulled to reduce the pressure inside the diversion plate 5, overcoming the first compression spring 26 in the absorption component to suck the low-viscosity area sludge into the inside of the diversion plate 5. When the contact protrusion 31 continues to rotate and the main wire 30 enters the groove 32 of the contact protrusion 31, the main wire 30 coincides with the virtual central axis of the rotating shaft 1 again, and the elastic recovery of the main wire 30 cancels the pulling of each branch wire 33. The second tension spring 42 inside the diversion plate 5 will pull the sealing plate 15 to increase the pressure inside the diversion plate 5, overcoming the first tension spring 20 in the ejection component to eject the sludge inside the diversion plate 5 to fill the blank area.

[0081] It should be noted that:

[0082] When working inside the sludge dryer, the sludge is divided into three stage areas, namely the sludge phase, the viscous transition phase, and the granular phase. The sector plate 3 should be set at the corresponding positions of the sludge phase and the viscous transition phase.

[0083] The specific position of the blank area can be determined according to the temperature distribution of the inner cavity of the sludge dryer detected by the infrared thermal imager, which helps to adjust the angle of the drainage plate 5 for precise operation;

[0084] The sealing plate 15 located in the receiving groove 13 is sleeved with a sealing ring made of rubber to play a sealing role, which is a conventional technology and will not be elaborated here.

[0085] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A stirring sludge dryer, characterized in that, Comprising: A rotating shaft (1); Agitating paddles (2), coaxially and fixedly arranged on the rotating shaft (1); Sector plates (3), fixedly and equidistantly distributed on the rotating shaft (1), staggered with the neutral regions of the agitating paddles (2); Sector grooves (4), opened in the sector plates (3), both sides having openings; Drainage plates (5), obliquely arranged inside the sector grooves (4); Wherein, when the rotating shaft (1) is driven to rotate, the sludge in the low-viscosity region inside the sector groove (4) is pushed under the inclination angle of the drainage plate (5) and moves towards the blank region to fill it.

2. The stirring sludge dryer according to claim 1, characterized in that, A fixed shaft (6) is fixedly connected inside the sector groove (4), the drainage plate (5) is provided with a shaft groove (7) adapted to the fixed shaft (6), and the fixed shaft (6) is snapped into the shaft groove (7) to enable a rotational connection between one end of the drainage plate (5) and the sector plate (3). A torsion spring (8) is arranged in the shaft groove (7), and both ends of the torsion spring (8) are respectively connected to the shaft groove (7) and the fixed shaft (6). The other end of the drainage plate (5) is connected to the sector plate (3) through a lead wire (9), and the inclination angle of the drainage plate (5) itself inside the sector groove (4) is controlled by adjusting the length of the lead wire (9).

3. A stirring sludge dryer according to claim 1, characterized in that, The sector plate (3) is provided with a threaded groove (10), and a threaded rod (11) is threadedly connected to the threaded groove (10). The threaded rod (11) has an annular protrusion (12) for separation, dividing the threaded rod (11) into upper and lower parts. The upper part is connected to the lead wire (9), and the lead wire (9) is wound around the upper part of the threaded rod (11) in a winding manner. The lower part is a threaded section, threadedly connected to the threaded groove (10).

4. A stirring sludge dryer according to claim 1, characterized in that, A plurality of ejection components are arranged on one side of the drainage plate (5) facing the blank region, and a plurality of absorption components are arranged on the other side of the drainage plate (5) facing away from the blank region. Both the ejection components and the absorption components are one-way flow components, and a slidable sealing plate (15) is arranged inside the drainage plate (5).

5. A stirring sludge dryer according to claim 1, characterized in that, A receiving groove (13) is opened inside the drainage plate (5). Two partition plates (14) are fixedly connected to the middle part inside the receiving groove (13), dividing the receiving groove (13) into upper, middle, and lower parts. The sealing plate (15) is slidably and sealingly arranged in the middle part, and the partition plates (14) are provided with through openings (41) to enable communication between the upper, middle, and lower parts.

6. A stirring sludge dryer according to claim 4, characterized in that, The ejection components are arranged in the upper part of the receiving groove (13) and include: A first end cap (16); A first connecting ring (17), coaxially and fixedly connected to the first end cap (16); A first communication cylinder (18), arranged inside the drainage plate (5) and fixedly connected to the drainage plate (5), having a plurality of openings; A first support ring (19), coaxially and fixedly connected to the first communication cylinder (18); A first tension spring (20), one end of which is connected to the first end cap (16) and the other end is connected to the first communication cylinder (18); Wherein, the first support ring (19) is slidably connected to the first connecting ring (17), and the drainage plate (5) is provided with a plurality of ejection holes (21).

7. A stirring type sludge dryer according to claim 4, characterized in that, The absorption components are arranged in the lower part of the receiving groove (13) and include: A second end cap (22); A second connecting ring (23), coaxially and fixedly connected to the second end cap (22); The second inter - communication cylinder (24) is arranged inside the drainage plate (5) and fixedly connected to the drainage plate (5), and has a plurality of openings; The second support ring (25) is coaxially and fixedly connected to the second inter - communication cylinder (24); The first compression spring (26) has one end connected to the second end cover (22) and the other end connected to the second inter - communication cylinder (24); Among them, the second support ring (25) is slidably connected to the second connection ring (23), and the drainage plate (5) is provided with a plurality of suction holes (27).

8. A stirring sludge dryer according to claim 4, characterized in that, A first connecting plate (28) is fixedly connected inside the rotating shaft (1), and a second connecting plate (29) is fixedly connected outside the rotating shaft (1). The first connecting plate (28) and the second connecting plate (29) are connected by a main wire (30). The main wire (30) is arranged to coincide with the virtual central axis of the rotating shaft (1). A plurality of contact protrusions (31) are also fixedly connected inside the rotating shaft (1). The contact protrusions (31) are provided with grooves (32). Each branch wire (33) extends from the main wire (30). The branch wire (33) passes through the rotating shaft (1) and extends inside the sector plate (3), and then passes through the fixed shaft (6) and the drainage plate (5) in sequence, and is connected to the sealing plate (15). The main wire (30) and the branch wires (33) are all made of silicone rubber, TPE or polyester - type TPEE. The sealing plate (15) is also arranged in the opposite direction of the pulling of the branch wire (33) through the second tension spring (42).

9. A stirring sludge dryer according to claim 1, characterized in that, The stirring - type sludge dryer further includes a gear motor (34), a material inlet (35), a solid outlet (36), a steam outlet (37), a heating medium inlet (38), a heating medium outlet (39) and a heat - exchange jacket (40).

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