System for drying sludge by using flue gas waste heat

Abstract

The invention belongs to the technical field of sludge treatment, particularly relates to a system for drying sludge by using flue gas waste heat, and provides the following scheme aiming at the problems that in the existing sludge drying process, boiler flue gas waste heat is inconvenient to fully utilize, and sludge is inconvenient to fully dry by using the waste heat, so that the sludge treatment efficiency is reduced. The system comprises a concentration module, the concentration module is connected with a plate-and-frame filter pressing module, the plate-and-frame filter pressing module is connected with a flue gas drying module, the flue gas drying module is connected with a dry sludge storage bin module, the dry sludge storage bin module is connected with a sludge blending module, the sludge blending module is connected with a conveying module, and the conveying module is connected with the plate-and-frame filter pressing module. According to the sludge treatment system, in the using process, boiler flue gas waste heat can be fully utilized, sludge can be fully dried through waste heat, the sludge treatment efficiency can be effectively improved, the structure is simple, and use is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of sludge treatment, and in particular to a system for drying sludge by utilizing flue gas waste heat. Background Art

[0002] Papermaking sludge treatment and disposal is an important part of sewage treatment. The degree of treatment and disposal is an important criterion for evaluating the status of sewage treatment. If the treatment and disposal work is not done well, it will become a pollution transfer, which will pollute the soil, water source and even the food chain again. The current sludge treatment methods mainly include sanitary landfill, thermochemical treatment and agricultural composting. Among them, thermal treatment includes drying, incineration and pyrolysis. Sludge thermal drying can significantly reduce the moisture content and volume of sludge, which provides the prerequisite for the resource utilization of sludge and other disposal methods. Sludge incineration has the advantages of completely killing pathogens, significantly reducing sludge volume and recovering energy. Therefore, sludge drying and incineration are often combined for application.

[0003] In the prior art, it is not convenient to fully utilize the waste heat of boiler flue gas during the sludge drying process, and it is not convenient to fully dry the sludge with the waste heat, which leads to a reduction in the sludge treatment efficiency. For this reason, we propose a system for drying sludge using waste heat from flue gas to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art that it is not convenient to fully utilize the waste heat of boiler flue gas during the sludge drying process, and it is not convenient to fully dry the sludge with waste heat, which leads to reduced sludge treatment efficiency. A system for drying sludge using waste heat from flue gas is proposed.

[0005] The present application provides a system for drying sludge using flue gas waste heat, which adopts the following technical solution:

[0006] A system for drying sludge using flue gas waste heat, comprising:

[0007] A concentration module, wherein the concentration module is connected to a plate and frame filter press module, the plate and frame filter press module is connected to a flue gas drying module, the flue gas drying module is connected to a dry sludge storage bin module, the dry sludge storage bin module is connected to a sludge blending module, the sludge blending module is connected to a conveying module, the conveying module is connected to a boiler module, the boiler module is connected to a flue gas treatment system, the flue gas treatment system is connected to an emission module, the flue gas drying module comprises a bottom plate, a drying box is fixedly installed on the top of the bottom plate, an exhaust port and a feed port are respectively provided on the top and one side of the drying box, a bellows is fixedly installed on one side of the drying box, the bellows and the drying box are fixedly installed with the same flue gas conveying pipe, a collecting box is fixedly installed on the top of the bottom plate, a rolling mechanism is arranged in the drying box, the rolling mechanism is used for rolling drying the sludge, a support plate is fixedly installed on the bottom of the drying box, a mud discharge port is provided on one side of the drying box, an opening and closing mechanism is provided on the support plate, the opening and closing mechanism is used for intermittently opening and closing the mud discharge port.

[0008] Furthermore, the rolling mechanism includes two annular plates, annular grooves are provided on the inner walls on both sides of the drying box, the two annular plates are rotatably installed in the two annular grooves respectively, the inner walls of the two annular plates are fixedly connected to the same filter cartridge, and the outer sides of the two annular plates are fixedly installed with a first gear ring and a second gear ring respectively, the first gear ring is meshed with the first gear, and when the first gear rotates, the first gear drives the first gear ring to rotate.

[0009] Furthermore, a first sprocket is fixedly mounted on the other end of the first transmission rod, and a second sprocket is fixedly mounted on one end of the second transmission rod. The first sprocket and the second sprocket are meshed with the same first chain. When the first transmission rod rotates, the first sprocket drives the second sprocket to rotate via the first chain.

[0010] Furthermore, a small sprocket is fixedly mounted on the outer side of the first transmission rod, and the small sprocket and the large sprocket are meshed with the same second chain. When the first transmission rod rotates, the small sprocket drives the large sprocket to rotate through the second chain.

[0011] Furthermore, the opening and closing mechanism includes a guide rod, which is slidably mounted on the drying box and the support plate. A connecting plate is fixedly mounted on one end of the guide rod, a blocking block is fixedly mounted on one side of the connecting plate, the blocking block cooperates with the mud discharge port, and a fixed block is fixedly mounted on the outer side of the guide rod.

[0012] Furthermore, a fourth transmission rod is rotatably installed at the bottom of the drying box, a second bevel gear is fixedly installed on the outer side of the fourth transmission rod, the second bevel gear is meshed with the first bevel gear, one end of the fourth transmission rod is fixedly connected with a cam, the cam cooperates with the guide rod, a return spring is sleeved on the outer side of the guide rod, the two ends of the return spring are respectively fixedly connected to the outer side of the fixed block and one side of the support plate, a second bearing is fixedly installed on the inner wall of the bottom of the drying box, the inner wall of the second bearing is fixedly connected to the outer side of the fourth transmission rod, and when the first bevel gear rotates, the second bevel gear drives the fourth transmission rod to rotate.

[0013] Furthermore, a third transmission rod is rotatably installed on one side of the drying box, a second gear is fixedly installed on the outer side of the third transmission rod, the second gear is meshed with the second gear ring, and a first bevel gear is fixedly installed on one end of the third transmission rod. When the second gear ring rotates, the second gear drives the third transmission rod to rotate.

[0014] Furthermore, a screw conveying rod is rotatably mounted on one side of the drying box, the screw conveying rod is located in the mud discharge port, and a large sprocket is fixedly mounted on one end of the screw conveying rod.

[0015] Furthermore, an air outlet is provided on one side of the bellows, the air outlet is communicated with the drying box, a second transmission rod is rotatably mounted on the other side of the bellows, and an impeller is fixedly mounted on the outer side of the second transmission rod.

[0016] Furthermore, a first transmission rod is rotatably installed in the drying box, a motor is fixedly installed on one side of the drying box, the output shaft of the motor is fixedly connected to one end of the first transmission rod, a first gear is fixedly installed on the outer side of the first transmission rod, a first bearing is fixedly installed on one side of the drying box, the inner wall of the first bearing is fixedly connected to the outer side of the first transmission rod, and when the motor is turned on, the motor drives the first transmission rod to rotate.

[0017] In summary, the present application includes at least one of the following beneficial technical effects:

[0018] 1. In this solution, when the motor is turned on, the motor drives the first transmission rod to rotate, the first transmission rod drives the first gear to rotate, the first gear drives the first gear ring to rotate, the first gear ring drives the annular plate and the filter cartridge to rotate, and the filter cartridge can throw out the sludge water and make it evenly heated;

[0019] 2. In this solution, when the first transmission rod rotates, the first transmission rod drives the first sprocket to rotate, the first sprocket drives the second sprocket to rotate through the first chain, and the second transmission rod drives the impeller to rotate. The suction force generated by the rotation of the impeller can transport the boiler flue gas to the drying box through the flue gas conveying pipe, and then the waste heat of the flue gas can be used to preheat and dry the sludge;

[0020] 3. In this scheme, when the annular plate rotates, the second gear ring drives the second gear to rotate, the third transmission rod drives the first bevel gear to rotate, the first bevel gear drives the second bevel gear to rotate, the fourth transmission rod drives the cam to rotate, the cam drives the guide rod to move horizontally, the guide rod drives the connecting plate and the blocking block to move horizontally, and then the mud discharge port can be reciprocatedly opened and closed, so that the sludge can be fully stayed and dried in the filter cartridge.

[0021] The present invention can fully utilize the waste heat of boiler flue gas during use, and can fully dry the sludge with the waste heat, thereby effectively improving the sludge treatment efficiency, and has a simple structure and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural block diagram of a system for drying sludge using flue gas waste heat proposed by the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of a flue gas drying module of a system for drying sludge using flue gas waste heat proposed by the present invention;

[0024] Figure 3 The present invention proposes a system for drying sludge using flue gas waste heat Figure 2 The structural diagram of the enlarged part A in the middle;

[0025] Figure 4 The present invention proposes a system for drying sludge using flue gas waste heat Figure 2 The enlarged structural diagram of part B in the middle;

[0026] Figure 5 The present invention proposes a system for drying sludge using flue gas waste heat Figure 2 The enlarged structural diagram of part C in the middle;

[0027] Figure 6 The present invention proposes a system for drying sludge using flue gas waste heat Figure 2 Schematic diagram of the structure with the D part enlarged.

[0028] Figure numerals: 1, drying box; 2, bottom plate; 3, bellows; 4, collecting box; 5, feed port; 6, smoke conveying pipe; 7, filter cartridge; 8, annular plate; 9, motor; 10, first transmission rod; 11, first gear; 12, first gear ring; 13, first sprocket; 14, first chain; 15, second sprocket; 16, second transmission rod; 17, impeller; 18, small sprocket; 19, second chain; 20, large sprocket; 21, screw Rotating conveying rod; 22, mud discharge port; 23, blocking block; 24, connecting plate; 25, second gear; 26, third transmission rod; 27, first bevel gear; 28, second bevel gear; 29, fourth transmission rod; 30, cam; 31, guide rod; 32, support plate; 33, return spring; 34, fixing block; 35, air outlet; 36, annular groove; 37, first bearing; 38, second bearing; 39, second gear ring; 40, exhaust port. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] Embodiment 1

[0031] Reference Figure 1-Figure 6 , a system for drying sludge using flue gas waste heat, comprising:

[0032] The concentration module is connected to the plate-frame filter press module, the plate-frame filter press module is connected to the flue gas drying module, the flue gas drying module is connected to the dry sludge storage module, the dry sludge storage module is connected to the sludge blending module, the sludge blending module is connected to the conveying module, the conveying module is connected to the boiler module, the boiler module is connected to the flue gas treatment system, the flue gas treatment system is connected to the emission module, the flue gas drying module includes a bottom plate 2, a drying box 1 is fixedly installed on the top of the bottom plate 2, and the top and one side of the drying box 1 are respectively An exhaust port 40 and a feed port 5 are provided, a bellows 3 is fixedly installed on one side of the drying box 1, and the same smoke conveying pipe 6 is fixedly installed on the bellows 3 and the drying box 1, a collecting box 4 is fixedly installed on the top of the bottom plate 2, a rolling mechanism is provided in the drying box 1, and the rolling mechanism is used for rolling drying the sludge, a support plate 32 is fixedly installed on the bottom of the drying box 1, a mud discharge port 22 is provided on one side of the drying box 1, and an opening and closing mechanism is provided on the support plate 32, and the opening and closing mechanism is used for intermittently opening and closing the mud discharge port 22.

[0033] Reference Figure 2-Figure 6The rolling mechanism includes two annular plates 8. Annular grooves 36 are provided on the inner walls of both sides of the drying box 1. The two annular plates 8 are rotatably installed in the two annular grooves 36 respectively. The inner walls of the two annular plates 8 are fixedly connected with the same filter cartridge 7. The outer sides of the two annular plates 8 are respectively fixedly installed with a first gear ring 12 and a second gear ring 39. The first gear ring 12 is meshed with the first gear 11. When the first gear 11 rotates, the first gear 11 drives the first gear ring 12 to rotate. The other end of the first transmission rod 10 is fixedly installed with a first sprocket 13. One end of the second transmission rod 16 is fixedly installed with a second sprocket 15. The first sprocket 13 and the second sprocket 15 are meshed with the same first chain 14. When the first transmission rod 10 rotates, the first sprocket 13 passes through the first chain 14. The second sprocket 15 is driven to rotate. A small sprocket 18 is fixedly installed on the outer side of the first transmission rod 10. The small sprocket 18 and the large sprocket 20 are meshed with the same second chain 19. When the first transmission rod 10 rotates, the small sprocket 18 drives the large sprocket 20 to rotate through the second chain 19. The opening and closing mechanism includes a guide rod 31, which is slidably installed on the drying box 1 and the support plate 32. A connecting plate 24 is fixedly installed on one end of the guide rod 31, and a blocking block 23 is fixedly installed on one side of the connecting plate 24. The blocking block 23 cooperates with the mud discharge port 22. A fixed block 34 is fixedly installed on the outer side of the guide rod 31. A fourth transmission rod 29 is rotatably installed at the bottom of the drying box 1. A second bevel gear 28 is fixedly installed on the outer side of the fourth transmission rod 29. The second bevel gear 28 and the first bevel gear 27 are fixedly installed. The cam 30 is meshed with the guide rod 31, and a return spring 33 is sleeved on the outer side of the guide rod 31. The two ends of the return spring 33 are respectively fixedly connected to the outer side of the fixed block 34 and one side of the support plate 32. A second bearing 38 is fixedly installed on the inner wall of the bottom of the drying box 1. The inner wall of the second bearing 38 is fixedly connected to the outer side of the fourth transmission rod 29. When the first bevel gear 27 rotates, the second bevel gear 28 drives the fourth transmission rod 29 to rotate. The third transmission rod 26 is rotatably installed on one side of the drying box 1. The second gear 25 is fixedly installed on the outer side of the third transmission rod 26. The second gear 25 meshes with the second gear ring 39. The first bevel gear 27 is fixedly installed on one end of the third transmission rod 26. When the second gear ring 39 rotates, the second gear 25 drives the third transmission rod 26 to rotate, a spiral conveying rod 21 is rotatably installed on one side of the drying box 1, and the spiral conveying rod 21 is located in the mud discharge port 22. A large sprocket 20 is fixedly installed on one end of the spiral conveying rod 21. An air outlet 35 is opened on one side of the bellows 3, and the air outlet 35 is communicated with the drying box 1. A second transmission rod 16 is rotatably installed on the other side of the bellows 3, and an impeller 17 is fixedly installed on the outer side of the second transmission rod 16. A first transmission rod 10 is rotatably installed in the drying box 1, and a motor 9 is fixedly installed on one side of the drying box 1. The output shaft of the motor 9 is fixedly connected to one end of the first transmission rod 10, and a first gear 11 is fixedly installed on the outer side of the first transmission rod 10. A first bearing 37 is fixedly installed on one side of the drying box 1.The inner wall of the first bearing 37 is fixedly connected to the outer side of the first transmission rod 10. When the motor 9 is turned on, the motor 9 drives the first transmission rod 10 to rotate.

[0034] The implementation principle of this embodiment is as follows: when in use, the sludge is conveyed into the filter cartridge 7 through the feed port 5, the flue gas conveying pipe 6 is connected to the boiler, and then the motor 9 is turned on, the motor 9 drives the first transmission rod 10 to rotate, the first transmission rod 10 drives the first gear 11 to rotate, the first gear 11 drives the first gear ring 12 to rotate, the first gear ring 12 drives the annular plate 8 to rotate, the annular plate 8 drives the filter cartridge 7 to rotate, and then the centrifugal force generated by the rotation of the filter cartridge 7 can throw out the sludge water, and at the same time the first transmission rod 10 drives the first sprocket 13 The first sprocket 13 drives the second sprocket 15 to rotate through the first chain 14, the second sprocket 15 drives the second transmission rod 16 to rotate, the second transmission rod 16 drives the impeller 17 to rotate, the suction force generated by the rotation of the impeller 17 can convey the boiler flue gas to the drying box 1 through the flue gas conveying pipe 6, and then the sludge in the filter cartridge 7 can be dried, so as to achieve the purpose of utilizing the flue gas. At the same time, the first transmission rod 10 drives the small sprocket 18 to rotate, the small sprocket 18 drives the large sprocket 20 to rotate through the second chain 19, and the large chain The wheel 20 drives the spiral conveying rod 21 to rotate, and the spiral conveying rod 21 can convey the dried sludge in the filter cartridge 7 to the collection box 4 through the sludge discharge port 22. At the same time, the filter cartridge 7 drives another annular plate 8 to rotate, and another annular plate 8 drives the second gear ring 39 to rotate, and the second gear ring 39 drives the second gear 25 to rotate, and the second gear 25 drives the third transmission rod 26 to rotate, and the third transmission rod 26 drives the first bevel gear 27 to rotate, and the first bevel gear 27 drives the second bevel gear 28 to rotate, and the second bevel gear 28 drives the fourth transmission rod 26 to rotate. The rod 29 rotates, and the fourth transmission rod 29 drives the cam 30 to rotate. The cam 30 drives the guide rod 31 to move horizontally to the right. The fixed block 34 stretches the reset spring 33. When the cam 30 rotates to a certain position, the reset spring 33 drives the fixed block 34 to reset through the deformation force, and then the fixed block 34 drives the guide rod 31 to reciprocate horizontally. The guide rod 31 drives the connecting plate 24 and the blocking block 23 to reciprocate horizontally. The blocking block 23 intermittently opens and closes the mud discharge port 22, which can make the sludge stay and dry fully in the filter cartridge 7 to ensure the drying effect.

[0035] Embodiment 2

[0036] The difference between this embodiment and the first embodiment is that two symmetrical vibration motors are fixedly installed on the top of the drying box 1. When the two vibration motors are turned on, the two vibration motors drive the drying box 1 and the filter cartridge 7 to vibrate, thereby preventing sludge from sticking to the filter cartridge 7 and affecting the sludge treatment effect.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A system for drying sludge using flue gas waste heat, characterized in that: include: A concentration module, wherein the concentration module is connected to a plate-frame filter press module, the plate-frame filter press module is connected to a flue gas drying module, the flue gas drying module is connected to a dry sludge storage module, the dry sludge storage module is connected to a sludge blending module, the sludge blending module is connected to a conveying module, the conveying module is connected to a boiler module, the boiler module is connected to a flue gas treatment system, the flue gas treatment system is connected to an emission module, the flue gas drying module comprises a bottom plate (2), a drying box (1) is fixedly mounted on the top of the bottom plate (2), and the top and one side of the drying box (1) are respectively provided with An exhaust port (40) and a feed port (5) are provided. A wind box (3) is fixedly installed on one side of the drying box (1). The wind box (3) and the drying box (1) are fixedly installed with a same smoke conveying pipe (6). A collecting box (4) is fixedly installed on the top of the bottom plate (2). A rolling mechanism is provided in the drying box (1). The rolling mechanism is used for rolling and drying the sludge. A support plate (32) is fixedly installed on the bottom of the drying box (1). A mud discharge port (22) is provided on one side of the drying box (1). An opening and closing mechanism is provided on the support plate (32). The opening and closing mechanism is used for intermittently opening and closing the mud discharge port (22).

2. The system for drying sludge using flue gas waste heat according to claim 1, characterized in that: A first transmission rod (10) is rotatably mounted in the drying box (1), a motor (9) is fixedly mounted on one side of the drying box (1), an output shaft of the motor (9) is fixedly connected to one end of the first transmission rod (10), a first gear (11) is fixedly mounted on the outer side of the first transmission rod (10), a first bearing (37) is fixedly mounted on one side of the drying box (1), and an inner wall of the first bearing (37) is fixedly connected to the outer side of the first transmission rod (10).

3. The system for drying sludge using flue gas waste heat according to claim 2, characterized in that: The rolling mechanism comprises two annular plates (8), annular grooves (36) are provided on the inner walls of both sides of the drying box (1), the two annular plates (8) are rotatably mounted in the two annular grooves (36), the inner walls of the two annular plates (8) are fixedly connected to the same filter cartridge (7), the outer sides of the two annular plates (8) are fixedly mounted with a first gear ring (12) and a second gear ring (39), and the first gear ring (12) is meshed with the first gear (11).

4. The system for drying sludge using flue gas waste heat according to claim 3 is characterized in that: An air outlet (35) is provided on one side of the wind box (3), and the air outlet (35) is communicated with the drying box (1). A second transmission rod (16) is rotatably mounted on the other side of the wind box (3), and an impeller (17) is fixedly mounted on the outer side of the second transmission rod (16).

5. The system for drying sludge using flue gas waste heat according to claim 4, characterized in that: A first sprocket (13) is fixedly mounted on the other end of the first transmission rod (10), a second sprocket (15) is fixedly mounted on one end of the second transmission rod (16), and the first sprocket (13) and the second sprocket (15) are meshed with a first chain (14).

6. The system for drying sludge using flue gas waste heat according to claim 5, characterized in that: A screw conveying rod (21) is rotatably mounted on one side of the drying box (1), the screw conveying rod (21) is located in the mud discharge port (22), and a large sprocket (20) is fixedly mounted on one end of the screw conveying rod (21).

7. The system for drying sludge using flue gas waste heat according to claim 6, characterized in that: A small sprocket (18) is fixedly mounted on the outer side of the first transmission rod (10), and the small sprocket (18) and the large sprocket (20) are meshed with a second chain (19).

8. The system for drying sludge using flue gas waste heat according to claim 7, characterized in that: A third transmission rod (26) is rotatably mounted on one side of the drying box (1), a second gear (25) is fixedly mounted on the outer side of the third transmission rod (26), the second gear (25) is meshed with a second gear ring (39), and a first bevel gear (27) is fixedly mounted on one end of the third transmission rod (26).

9. The system for drying sludge using flue gas waste heat according to claim 8, characterized in that: The opening and closing mechanism comprises a guide rod (31), the guide rod (31) is slidably mounted on the drying box (1) and the support plate (32), a connecting plate (24) is fixedly mounted on one end of the guide rod (31), a blocking block (23) is fixedly mounted on one side of the connecting plate (24), the blocking block (23) is matched with the mud discharge port (22), and a fixing block (34) is fixedly mounted on the outer side of the guide rod (31).

10. A system for drying sludge using flue gas waste heat according to claim 9, characterized in that: A fourth transmission rod (29) is rotatably mounted at the bottom of the drying box (1), a second bevel gear (28) is fixedly mounted on the outer side of the fourth transmission rod (29), the second bevel gear (28) is meshed with the first bevel gear (27), one end of the fourth transmission rod (29) is fixedly connected with a cam (30), the cam (30) is matched with a guide rod (31), a return spring (33) is sleeved on the outer side of the guide rod (31), the two ends of the return spring (33) are respectively fixedly connected to the outer side of the fixed block (34) and one side of the support plate (32), a second bearing (38) is fixedly mounted on the inner wall of the bottom of the drying box (1), the inner wall of the second bearing (38) is fixedly connected to the outer side of the fourth transmission rod (29).

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