Sludge drying treatment device and system

Abstract

The present application belongs to the technical field of sludge treatment, and particularly relates to a sludge drying treatment device, which comprises a mounting seat, wherein the mounting seat is in a groove shape, a reactor outer cylinder is rotatably connected to the mounting seat, a reactor inner cylinder is fixedly arranged in the reactor outer cylinder, a cover is arranged on the top of the reactor inner cylinder and the reactor outer cylinder, and the cover is fixedly connected between the mounting seat and a plurality of support columns; a heating cavity is formed between the reactor inner cylinder and the reactor outer cylinder, a steam inlet pipe and a steam outlet pipe are connected to the cover, the steam inlet pipe and the steam outlet pipe are both in communication with the heating cavity, a feeding stirring shaft is arranged in the reactor inner cylinder, and a feeding pipe is rotatably connected to the top of the feeding stirring shaft; and the reactor inner cylinder is provided with a discharging pipe. Through the design of double-power rotation, the sludge is dispersed into a film by using double centrifugal force, so that the problems of low sludge drying treatment rate and high energy consumption are solved.

Description

Technical Field

[0001] This invention relates to the field of sludge treatment technology, and in particular to a sludge drying treatment device and system. Background Technology

[0002] Sludge treatment is the process of reducing, stabilizing, and rendering harmless sludge. The higher the level of wastewater treatment, the more sludge residue will be generated and requires treatment. Unless land-based treatment or sewage ponds are used, most wastewater treatment plants must have sludge treatment facilities. For modern wastewater treatment plants, sludge treatment and disposal has become the most complex and costly part of the wastewater treatment system operation.

[0003] With the increasing scale of wastewater treatment, the production of sludge from wastewater treatment plants is also gradually increasing, making sludge treatment one of the most pressing environmental governance issues. In the past, landfill disposal was the primary method for sludge treatment, but this has a significant negative impact on the environment and is unsustainable. Other treatment technologies include anaerobic digestion, aerobic composting, incineration, and wet air oxidation. Anaerobic digestion suffers from long reaction times, low efficiency, large reactor volumes, and the need for further treatment of the sludge after digestion. Aerobic composting has long processing cycles, requires large land areas, releases pollutants, and carries the burden of finding markets for large quantities of compost products. Sludge incineration, while removing organic pollutants from the sludge, has high investment and operating costs and produces large amounts of harmful flue gas, leading to air pollution.

[0004] Chinese patent CN109160710B discloses a complete set of sludge treatment equipment and method with a sludge pre-drying device, including a first screw conveyor, a sludge removal device, a second screw conveyor, a sludge pre-drying device, and a sludge dryer. The sludge removal device has a sludge temporary storage tank and an impurity collection tank. The sludge removal device can separate sludge and impurities from sludge containing impurities, collecting the separated sludge into the sludge temporary storage tank and the separated impurities into the impurity collection tank. The sludge pre-drying device can perform pre-drying operations on the sludge, and then send the pre-dried sludge into the sludge dryer for drying. This invention provides a complete set of sludge treatment equipment and method with a sludge pre-drying device, integrating sludge removal, sludge pre-drying, and sludge drying functions, resulting in good sludge treatment effect and high efficiency.

[0005] The aforementioned patent integrates impurity removal, pre-drying, and drying functions, making the processing equipment relatively complex and energy-intensive, and it does not further treat the waste gas. Summary of the Invention

[0006] Based on the technical problems existing in the background art, the present invention provides a sludge drying device and system. Through the design of dual-power rotation, the sludge is dispersed into a thin film by dual centrifugal force, which solves the problems of low sludge drying rate and high energy consumption.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] This invention claims protection for a sludge drying treatment device, including a mounting base, the mounting base being groove-shaped, a reactor outer cylinder rotatably connected to the mounting base, a reactor inner cylinder fixed inside the reactor outer cylinder, and a cover covering the top of the reactor inner cylinder and the reactor outer cylinder, the cover being fixedly connected to the mounting base via multiple support columns; a heating chamber is formed between the reactor inner cylinder and the reactor outer cylinder, and a steam inlet pipe and a steam outlet pipe are connected to the cover, both of which communicate with the heating chamber;

[0009] The reactor inner cylinder is equipped with a feeding stirring shaft, the bottom end of which is rotatably connected to the reactor inner cylinder. The top end of the feeding stirring shaft extends through the cover and is connected to a first rotating mechanism, which is mounted on the cover. A feeding pipe is rotatably connected to the top of the feeding stirring shaft. A discharge pipe is provided on the lower side of the reactor inner cylinder, and the outlet of the discharge pipe extends through the reactor outer cylinder. An air inlet pipe is provided at the bottom of the reactor outer cylinder, and an auxiliary air inlet pipe is rotatably connected to the air outlet of the air inlet pipe. The auxiliary air inlet pipe communicates with the reactor inner cylinder. A second rotating mechanism is also connected to the reactor outer cylinder, and the second rotating mechanism is mounted in the mounting base groove. An air outlet pipe is connected to the cover.

[0010] Preferably, the feeding stirring shaft has a feeding channel inside, and multiple sets of stirring horizontal shafts and feeding nozzles are fixed on the feeding stirring shaft. The multiple sets of feeding nozzles are arranged at intervals with the stirring horizontal shafts and are all located inside the reactor cylinder. One end of the feeding nozzle fixed on the feeding stirring shaft is connected to the feeding channel. The top of the feeding stirring shaft is rotatably connected to the outlet of the feeding pipe through a second bearing. The end of the stirring horizontal shaft away from the rotating shaft is provided with stirring blades.

[0011] Preferably, the first rotating mechanism includes a first motor fixed to the top of the cover, the output shaft of the first motor is fixedly connected to a first driving bevel gear, the first driving bevel gear meshes with a first driven bevel gear, and the first driven bevel gear is fixed on the feed stirring shaft.

[0012] Preferably, the second rotating mechanism includes a second motor installed at the bottom of the mounting base groove, a second driving bevel gear fixedly connected to the output shaft of the second motor, the second driving bevel gear meshing with a second driven bevel gear, the second driven bevel gear being fixed on a hollow shaft, the hollow shaft being fixed on the outer cylinder of the reactor and having its top inserted into the bottom plate of the inner cylinder of the reactor; the auxiliary air inlet pipe is located inside the hollow shaft and is sealed and fitted to the inner wall of the hollow shaft.

[0013] Preferably, the bottom plate of the reactor inner cylinder is provided with multiple aeration channels, which are concentric rings of different sizes and connected in sequence. Each aeration channel is connected with multiple aeration holes. The aeration channels are connected to the aeration holes. A gas release device is installed at the end of the aeration hole away from the aeration channel. The gas release device is located inside the reactor inner cylinder. One of the aeration channels is connected to the outlet of the auxiliary air inlet pipe.

[0014] Preferably, the outer ring of the second bearing is fixed on the inner wall of the top of the rotating shaft, and the inner ring of the second bearing is fixed to the outer wall of the outlet end of the feed pipe.

[0015] Preferably, a rotating bearing is installed between the mounting base and the outer cylinder of the reactor, the outer ring of the rotating bearing is fixed to the inner wall of the groove of the mounting base, and the inner ring of the rotating bearing is fixed to the outer wall of the outer cylinder of the reactor.

[0016] Preferably, the inner wall of the reactor inner cylinder is provided with a discharge trough, which is spiral downward and runs around the inner wall of the reactor inner cylinder twice, and the discharge port of the discharge trough is located at the discharge pipe.

[0017] Preferably, a discharge control valve is installed on the discharge pipe located outside the outer cylinder of the reactor.

[0018] The present invention also claims a sludge drying treatment system, including the above-mentioned device, wherein the outlet of the outlet pipe is connected to a heat exchanger, the bottom of the heat exchanger is connected to the inlet end of the inlet pipe, the top of the heat exchanger is also connected to a condensate inlet, the bottom of the heat exchanger is connected to a liquid drain pipe, and the middle of the heat exchanger is also connected to a waste gas discharge pipe.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) The sludge drying treatment device of the present invention drives the feed rotating shaft to rotate through the first transmission mechanism and drives the reactor to rotate through the second transmission mechanism. With the dual power and bidirectional rotation, and the steam introduced into the heating chamber between the inner and outer cylinders of the reactor, the object with higher water content in the device is preferentially contacted with the heating surface of the inner cylinder. At the same time, the sludge in the dryer is better dispersed into a thin film. Under the action of centrifugal force, the contact speed between the dried object and the heating surface is very fast. During heating, evaporation occurs simultaneously. The heating area and the evaporation area are similar, so the heat transfer efficiency is very high, the drying speed is fast, and the energy consumption is reduced. After treatment by the device, the sludge water content is less than 30%.

[0021] (2) The hot air entering through the air inlet pipe of the present invention enters the reactor through the gas release device, comes into contact with the sludge, takes away the moisture in the sludge, accelerates the volatilization of gas in the sludge, improves the drying efficiency of the reactor, and recovers the heat in the waste gas. After heat exchange, it can be reused, which improves the heat utilization rate and reduces energy consumption.

[0022] (3) The sludge entering through the feed pipe of the present invention is rotated by the feed rotating shaft. Under the action of centrifugal force, it is dispersed into the inner cylinder through the feed nozzle, which increases the contact area with the inner cylinder wall, increases the heating area, and further improves the drying speed of the sludge.

[0023] (4) The spiral discharge trough set in this invention has a smooth inner wall with a certain slope. After the sludge attached to the cylinder wall dries, it falls along the cylinder wall into the spiral discharge trough and slides down to the sludge discharge port under the action of gravity and is discharged from the reactor. It plays a guiding role, which facilitates the discharge of the dried sludge and ensures the material balance in the reactor. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of a sludge drying and treatment device according to the present invention;

[0025] Figure 2 This is a schematic cross-sectional view of the sludge drying and treatment device of the present invention.

[0026] Figure 3 This is a schematic diagram of the cross-sectional structure of the bottom plate of the inner cylinder of a sludge drying treatment device according to the present invention;

[0027] Figure 4 This is a schematic diagram of the inner cylinder structure of a sludge drying and treatment device according to the present invention;

[0028] Figure 5 This is a schematic diagram of the internal structure of the inner cylinder of a sludge drying and treatment device according to the present invention;

[0029] Figure 6 This is a schematic diagram of the overall structure of a sludge drying and treatment system according to the present invention.

[0030] The components are as follows: 1. Mounting base; 2. Heating chamber; 3. Reactor outer cylinder; 4. Reactor inner cylinder; 5. Cover; 6. Support column; 7. Feed stirring shaft; 8. Feed pipe; 9. Discharge pipe; 10. Steam inlet pipe; 11. Steam outlet pipe; 12. Air inlet pipe; 13. Air outlet pipe; 14. First motor; 15. First driving bevel gear; 16. First driven bevel gear; 17. Second motor; 18. Second driving bevel gear; 19. Second driven bevel gear; 20. Hollow shaft; 21. Auxiliary air inlet pipe; 22. Aeration channel; 23. Aeration hole; 24. Rotary bearing; 25. Discharge trough; 27. Waste gas discharge pipe; 28. Liquid drain pipe; 29. ​​Condensate inlet; 30. Heat exchanger; 31. Gas release device; 71. Feed channel; 72. Stirring horizontal shaft; 73. Feed nozzle; 74. Second bearing. Detailed Implementation

[0031] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention. Furthermore, the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0032] Example 1

[0033] like Figures 1-5 As shown, a sludge drying treatment device includes a mounting base 1, which is groove-shaped. A reactor outer cylinder 3 is rotatably connected to the mounting base 1. A reactor inner cylinder 4 is fixed inside the reactor outer cylinder 3. The tops of the reactor inner cylinder 4 and the reactor outer cylinder 3 are covered by a cover 5. The cover 5 is fixedly connected to the mounting base 1 by multiple support columns 6. A heating chamber 2 is formed between the reactor inner cylinder 4 and the reactor outer cylinder 3. A steam inlet pipe 10 and a steam outlet pipe 11 are connected to the cover 5. Both the steam inlet pipe 10 and the steam outlet pipe 11 are connected to the heating chamber 2.

[0034] Mounting base 1 is rotatably connected to the reactor in a sealed manner. Mounting base 1 is connected to cover 5 through support column 6. When the inner cylinder 4 and outer cylinder 3 of the reactor rotate, cover 5 does not rotate. Steam is introduced into the heating chamber 2 through steam inlet pipe 10 to heat the wall of inner cylinder 4, which helps the sludge moisture to evaporate.

[0035] The inner cylinder 4 of the reactor is equipped with a feeding stirring shaft 7. The bottom end of the feeding stirring shaft 7 is rotatably connected to the inner cylinder 4 of the reactor. The top end of the feeding stirring shaft 7 extends through the cover 5 and is connected to a first rotating mechanism, which is mounted on the cover 5. The top of the feeding stirring shaft 7 is rotatably connected to a feeding pipe 8. The lower side of the inner cylinder 4 of the reactor is equipped with a discharge pipe 9, the outlet of which extends through the outer cylinder 3 of the reactor. The bottom of the outer cylinder 3 of the reactor is equipped with an air inlet pipe 12, the outlet of which is rotatably connected to an auxiliary air inlet pipe 21, which communicates with the inner cylinder 4 of the reactor. The outer cylinder 3 of the reactor is also connected to a second rotating mechanism, which is mounted in the groove of the mounting base 1. The cover 5 is connected to an air outlet pipe 13.

[0036] Sludge enters the inner cylinder 4 through the feed pipe 8 and then the feed stirring shaft 7. The first rotating mechanism drives the feed stirring shaft 7 to rotate, and the second rotating mechanism drives the inner cylinder 4 and the outer cylinder 3 of the reactor to rotate in opposite directions. At this time, under the action of double centrifugal force, the sludge with higher water content will preferentially contact the heating surface of the inner cylinder 4. The contact speed between the sludge and the heating surface is very fast, and evaporation occurs simultaneously during heating. The heating area and the evaporation area are similar, resulting in very high heat transfer efficiency. At the same time, the air entering through the air inlet pipe 12 is introduced into the inner cylinder 4 through the auxiliary air inlet pipe 21, where it contacts the sludge, removes the water in the sludge, and accelerates the sludge evaporation efficiency. Afterward, the gaseous substances evaporated from the sludge are discharged to the next equipment through the air outlet pipe 13.

[0037] In this embodiment, the feeding stirring shaft 7 is provided with a feeding channel 71 inside. Multiple sets of stirring horizontal shafts 72 and feeding nozzles 73 are also fixed on the feeding stirring shaft 7. The multiple sets of feeding nozzles 73 are arranged at intervals with the stirring horizontal shafts 72 and are all located inside the reactor inner cylinder 4. One end of the feeding nozzle 73 fixed on the feeding stirring shaft 7 is connected to the feeding channel 71. The top of the feeding stirring shaft 7 is rotatably connected to the outlet of the feeding pipe 8 through a second bearing 74. The end of the stirring horizontal shaft 72 away from the rotating shaft is provided with stirring blades.

[0038] The feed nozzle 73 is connected to the feed channel 71. The sludge entering the feed channel 71 is evenly sprayed into the inner cylinder 4 by the feed nozzle 73 under the action of centrifugal force, thereby increasing the contact area between the sludge and the inner cylinder 4 wall, further increasing the overall heating area of ​​the sludge, resulting in fast drying speed. The stirring blades on the stirring horizontal shaft 72 can stir the sludge, making the sludge heat evenly. The feed pipe 8 and the feed stirring shaft 7 are rotatably connected by a second bearing 74, so that the feed pipe 8 can stably feed when the inner cylinder 4 and the outer cylinder 3 of the reactor rotate, avoiding the pipe twisting and knotting caused by the rotation of the feed pipe 8 when the reactor rotates, which would affect the feeding and the safety of the device operation.

[0039] In this embodiment, the first rotating mechanism includes a first motor 14 fixed to the top of the cover 5, the output shaft of the first motor 14 is fixedly connected to a first active bevel gear 15, the first active bevel gear 15 meshes with a first driven bevel gear 16, and the first driven bevel gear 16 is fixed on the feed stirring shaft 7.

[0040] The feeding and stirring shaft 7 is driven by the first motor 14 to mesh with the first driving bevel gear 15 and the first driven bevel gear 16, thereby realizing the rotation of the feeding and stirring shaft 7.

[0041] In this embodiment, the second rotating mechanism includes a second motor 17 installed at the bottom of the groove in the mounting base 1. A second driving bevel gear 18 is fixedly connected to the output shaft of the second motor 17. The second driving bevel gear 18 meshes with a second driven bevel gear 19. The second driven bevel gear 19 is fixed on a hollow shaft 20. The hollow shaft 20 is fixed on the outer cylinder 3 of the reactor, and its top penetrates the bottom plate of the inner cylinder 4 of the reactor. The auxiliary air inlet pipe 21 is sealed and fitted inside the hollow shaft 20.

[0042] The second motor 17 drives the second active bevel gear 18 and the second driven bevel gear 19 to mesh and rotate, causing the reactor inner cylinder 4 and reactor outer cylinder 3, which are fixed to the hollow shaft 20, to rotate together, thus realizing the rotation of the reactor. At the same time, the feed stirring shaft 7 also rotates. Under the action of the two rotating in opposite directions, the contact between the sludge and the inner cylinder 4 is accelerated, the heating area of ​​the sludge is increased, and the drying rate of the sludge is accelerated. It should be noted that the outer wall of the hollow shaft 20 is sealed and connected to the reactor inner cylinder 4 and reactor outer cylinder 3 to prevent steam leakage.

[0043] In this embodiment, the bottom plate of the reactor inner cylinder 4 is provided with multiple aeration channels 22. The multiple aeration channels 22 are concentric rings of different sizes and are connected in sequence. Each aeration channel 22 is connected with multiple aeration holes 23. The aeration channels 22 aerate the reactor inner cylinder 4 through the aeration holes 23. One of the aeration channels 22 is connected to the outlet of the auxiliary air inlet pipe 21.

[0044] The air entering through the air inlet pipe 12 is introduced into the aeration channel 22 through the auxiliary air inlet pipe 21, and further enters the inner cylinder 4 through multiple aeration holes 23, carrying away the moisture in the sludge and accelerating the sludge evaporation efficiency. The auxiliary air inlet pipe 21 and the air inlet pipe 12 are rotatably connected, which avoids the air inlet pipe 12 from rotating with the reactor, causing the pipe to twist or get tangled, affecting the feeding and the safety of the device operation.

[0045] In this embodiment, the outer ring of the second bearing 74 is fixed to the inner wall of the top of the feed stirring shaft 7, and the inner ring of the second bearing 74 is fixed to the outer wall of the outlet end of the feed pipe 8.

[0046] The connection between the second bearing 74 and the feeding mixing shaft and the feeding pipe 8 makes the feeding pipe 8 feed into the feeding channel 71 more smoothly, and makes the outer diameter of the feeding pipe 8 smaller than the inner diameter of the feeding channel, thus avoiding sludge residue on the second bearing 74 and causing blockage.

[0047] In this embodiment, a rotating bearing 24 is installed between the mounting base 1 and the outer cylinder 3 of the reactor. The outer ring of the rotating bearing 24 is fixed to the inner wall of the groove of the mounting base 1, and the inner ring of the rotating bearing 24 is fixed to the outer wall of the outer cylinder 3 of the reactor.

[0048] In this embodiment, a discharge trough 25 is provided on the inner wall of the reactor inner cylinder 4. The discharge trough 25 is spirally downward and is arranged around the inner wall of the reactor inner cylinder 4 twice. The discharge port of the discharge trough 25 is located at the discharge pipe 9.

[0049] As the inner cylinder 4 of the reactor rotates, the sludge that is tightly attached to the inner wall of the discharge trough 25 is rotated to the discharge pipe 9 and discharged under the action of the spiral discharge trough 25.

[0050] In this embodiment, a discharge control valve is installed on the discharge pipe 9 located outside the outer cylinder 3 of the reactor.

[0051] After the sludge is dried, the discharge control valve is opened to discharge the sludge into the reactor. It should be noted that during the operation of the device, the rotation of the discharge pipe 9 does not contact the support column 6 and will not cause interference.

[0052] Example 2

[0053] A sludge drying and treatment system includes the device described in Example 1. The outlet of the air outlet pipe 13 is connected to a heat exchanger 30. The bottom of the heat exchanger 30 is connected to the inlet end of the air inlet pipe 12. The top of the heat exchanger 30 is also connected to a condensate inlet 29. The bottom of the heat exchanger 30 is connected to a liquid drain pipe 28. The middle part of the heat exchanger 30 is also connected to a waste gas discharge pipe 27.

[0054] After the sludge exhaust gas discharged from the outlet pipe 13 is introduced into the heat exchanger, it exchanges heat with the condensed gas introduced into the heat exchanger 30. After the heat exchange, part of the sludge exhaust gas is cooled and turns into water and is discharged through the drain pipe 28, and part of the sludge exhaust gas is discharged through the exhaust pipe 27. The condensed gas from the heat exchange becomes hot gas and is introduced into the device through the inlet pipe 12 for use.

[0055] The working principle of the sludge treatment device and system of the present invention is as follows:

[0056] In operation, hot air enters the heating chamber 2 through the steam inlet pipe 10, and steam is slowly released through the steam outlet pipe 11. The first motor 14 and the second motor 17 are started to rotate in opposite directions. Sludge begins to enter through the feed pipe 8, and air begins to enter through the bottom air inlet pipe 12. Under the rotation of the feed stirring shaft 7, the sludge generates centrifugal force. The sludge enters the feed nozzle 73 through the feed channel 71 and is then sprayed out. Under the action of centrifugal force, the sprayed sludge with a high water content first contacts the inner cylinder 4 of the reactor. Under the action of the hot steam in the heating chamber 2, the inner cylinder 4 of the reactor is heated. The sludge with a high water content contacts the inner cylinder 4 of the reactor and quickly evaporates the water inside. At the same time, the inner cylinder 4 and the outer cylinder 3 of the reactor also rotate simultaneously. This generates centrifugal force under the stirring action of the feed stirring shaft 7 and also allows the sludge inside the reactor to evaporate. The rotation of cylinder 4 generates centrifugal force, and the double centrifugal force helps the sludge in the dryer to disperse into a thin film. Furthermore, the hot air entering through the inlet pipe 12 passes through the aeration channel 22 and then enters the inner cylinder 4 through multiple gas releasers 31, where it comes into contact with the sludge. Under the stirring action, the water in the sludge is carried away, accelerating the evaporation efficiency. Then, the gas evaporated from the sludge is discharged through the outlet pipe 13 to the heat exchanger 30, where it exchanges heat with the condensed gas introduced into the heat exchanger 30. After the heat exchange, some of the sludge waste gas cools down and turns into water, which is discharged through the drain pipe 28, while some of the sludge waste gas is discharged through the exhaust pipe 27. The condensed gas from the heat exchange becomes hot gas and is introduced into the device through the inlet pipe 12 for use. After the treatment is completed, the gas is discharged through the outlet pipe 13 to the heat exchanger 30 for recycling. In addition, under the dual centrifugal force of the feed mixing shaft 7 and the reactor, the sludge in contact with the inner cylinder 4 of the reactor dries and falls along the cylinder wall into the spiral discharge trough 25, and continues to slide down to the sludge discharge port. After the sludge is completely dried, the discharge valve is opened and the sludge is discharged from the reactor along the spiral discharge trough 25, which facilitates the discharge of the dried sludge.

[0057] Although the present invention has been disclosed above with reference to embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A sludge drying and treatment device, comprising a mounting base (1), characterized in that: The mounting base (1) is groove-shaped, and the outer cylinder (3) of the reactor is rotatably connected to the mounting base (1). The inner cylinder (4) of the reactor is fixed inside the outer cylinder (3). The top of the inner cylinder (4) and the outer cylinder (3) of the reactor are covered by a cover (5). The cover (5) is fixedly connected to the mounting base (1) by multiple support columns (6). A heating chamber (2) is formed between the inner cylinder (4) and the outer cylinder (3) of the reactor. A steam inlet pipe (10) and a steam outlet pipe (11) are connected to the cover (5). Both the steam inlet pipe (10) and the steam outlet pipe (11) are connected to the heating chamber (2). The inner cylinder (4) of the reactor is provided with a feeding stirring shaft (7), the bottom end of which is rotatably connected to the inner cylinder (4). The top end of the feeding stirring shaft (7) extends through the cover (5) and is connected to a first rotating mechanism, which is mounted on the cover (5). The top of the feeding stirring shaft (7) is rotatably connected to a feeding pipe (8). The lower side of the inner cylinder (4) of the reactor is provided with a discharge pipe (9), the outlet of which extends through the outer cylinder (3) of the reactor. The bottom of the outer cylinder (3) of the reactor is provided with an air inlet pipe (12), the outlet of which is rotatably connected to an auxiliary air inlet pipe (21), which communicates with the inner cylinder (4). The outer cylinder (3) of the reactor is also connected to a second rotating mechanism, which is mounted in the groove of the mounting base (1). The cover (5) is connected to an air outlet pipe (13).

2. The sludge drying and treatment device according to claim 1, characterized in that: The feed stirring shaft (7) is provided with a feed channel (71) inside. Multiple sets of stirring horizontal shafts (72) and feed nozzles (73) are also fixed on the feed stirring shaft (7). The multiple sets of feed nozzles (73) are arranged at intervals with the stirring horizontal shafts (72) and are all located inside the reactor inner cylinder (4). One end of the feed nozzle (73) fixed on the feed stirring shaft (7) is connected to the feed channel (71). The top of the feed stirring shaft (7) is rotatably connected to the outlet of the feed pipe (8) through a second bearing (74). The end of the stirring horizontal shaft (72) away from the feed stirring shaft (7) is provided with stirring blades.

3. The sludge drying and treatment device according to claim 1, characterized in that: The first rotating mechanism includes a first motor (14) fixed to the top of the cover (5), the output shaft of the first motor (14) is fixedly connected to a first driving bevel gear (15), the first driving bevel gear (15) meshes with a first driven bevel gear (16), and the first driven bevel gear (16) is fixed on the feed stirring shaft (7).

4. The sludge drying and treatment device according to claim 1, characterized in that: The second rotating mechanism includes a second motor (17) installed at the bottom of the groove in the mounting base (1). A second driving bevel gear (18) is fixedly connected to the output shaft of the second motor (17). The second driving bevel gear (18) meshes with a second driven bevel gear (19). The second driven bevel gear (19) is fixed on a hollow shaft (20). The hollow shaft (20) is fixed on the outer cylinder (3) of the reactor, and its top penetrates into the bottom plate of the inner cylinder (4) of the reactor. The auxiliary air inlet pipe (21) is located inside the hollow shaft (20) and is sealed and fitted to the inner wall of the hollow shaft (20).

5. The sludge drying and treatment device according to claim 4, characterized in that: The bottom plate of the reactor inner cylinder (4) is provided with multiple aeration channels (22). The multiple aeration channels (22) are concentric rings of different sizes and connected in sequence. Each aeration channel (22) is connected with multiple aeration holes (23). A gas release device (31) is installed at the end of the aeration hole (23) away from the aeration channel (22). The gas release device (31) is located inside the reactor inner cylinder (4). One of the aeration channels (22) is connected to the outlet of the auxiliary air inlet pipe (21).

6. The sludge drying and treatment device according to claim 2, characterized in that: The outer ring of the second bearing (74) is fixed on the inner wall of the top of the rotating shaft (7), and the inner ring of the second bearing (74) is fixed to the outer wall of the outlet end of the feed pipe (8).

7. The sludge drying and treatment device according to claim 1, characterized in that: A rotating bearing (24) is installed between the mounting base (1) and the outer cylinder (3) of the reactor. The outer ring of the rotating bearing (24) is fixed to the inner wall of the groove of the mounting base (1), and the inner ring of the rotating bearing (24) is fixed to the outer wall of the outer cylinder (3) of the reactor.

8. The sludge drying and treatment device according to claim 1, characterized in that: The inner wall of the reactor inner cylinder (4) is provided with a discharge trough (25). The discharge trough (25) is spiral downward and is arranged around the inner wall of the reactor inner cylinder (4) for two cycles. The discharge port of the discharge trough (25) is located at the discharge pipe (9).

9. A sludge drying and treatment device according to claim 1, characterized in that: A discharge control valve is installed on the discharge pipe (9) located outside the outer cylinder (3) of the reactor.

10. A sludge drying and treatment system, comprising the apparatus according to any one of claims 1-9, characterized in that: The outlet of the outlet pipe (13) is connected to the heat exchanger (30). The bottom of the heat exchanger (30) is connected to the inlet end of the inlet pipe (12). The top of the heat exchanger (30) is also connected to the condensate inlet (29). The bottom of the heat exchanger (30) is connected to the liquid drain pipe (28). The middle part of the heat exchanger (30) is also connected to the exhaust pipe (27).

Images