Indirect heating type pyrolysis device for oil sludge

Abstract

The invention relates to the technical field of pyrolysis devices, in particular to an oil sludge indirect heating type pyrolysis device which comprises a tank body, a feeding pipe is fixedly connected to the interior of the tank body, an inner tank is fixedly connected to the lower end of the feeding pipe, a stirring mechanism is arranged in the inner tank, and the stirring mechanism comprises a conical sleeve. An inner spiral auger is arranged on the outer surface of the conical sleeve, an outer spiral auger is arranged on the inner surface of the conical sleeve, a cleaning mechanism is arranged at the upper end of the conical sleeve and comprises a scraper blade, and a discharging mechanism is arranged at the lower end of the scraper blade; the conical sleeve is arranged to be conical and matched with the inner tank, the inner wall of the inner tank is arranged to be conical so that flowing oil sludge can be better attached to the heat transfer face of the inner tank under the action of gravity, and the inclined face of the conical sleeve is matched with the inclined face of the inner tank to provide supporting force for the outer spiral auger to drive the oil sludge to flow; the conical sleeve not only can provide a heat source for heating oil sludge in the center of the inner tank, but also can stir the oil sludge by combining the conical sleeve with a related structure.

Description

Technical Field

[0001] This invention relates to the field of pyrolysis equipment technology, specifically to an indirect heating pyrolysis device for oily sludge. Background Technology

[0002] The indirect heating pyrolysis device for oily sludge is an environmentally friendly treatment equipment based on thermochemical principles. Its core lies in achieving the harmless and resource-based treatment of oily sludge through indirect heating. In an oxygen-free or low-oxygen environment, the device utilizes the heat energy generated by fuels such as natural gas and diesel to transfer heat to the sludge through a partition wall or intermediate medium, causing the water, light oil, and organic matter such as polycyclic aromatic hydrocarbons in the sludge to vaporize and decompose at high temperatures, forming an oil-gas mixture and solid residue.

[0003] Oily sludge is an oil-based waste generated during petroleum extraction, refining, storage, and transportation. It has a complex composition and high oil content, and improper handling can easily cause serious environmental pollution. Harmless and resource-efficient pyrolysis is currently the mainstream disposal method. Most oily sludge pyrolysis treatments currently use indirect heating pyrolysis devices, relying on external heat sources to achieve pyrolysis and cracking. While this avoids direct contact between the material and the heat source, existing devices generally suffer from uneven heating. The oily sludge in the central area of ​​the tank is far from the heat transfer inner wall, making it prone to drying and carbonization on the inner wall and incomplete pyrolysis in the center, significantly reducing pyrolysis efficiency and treatment effect. Furthermore, existing pyrolysis devices use a single material stirring method, failing to achieve material circulation. Oily sludge easily adheres to the inner wall of the tank, forming scale, which affects heat transfer efficiency and easily causes unloading blockages. Summary of the Invention

[0004] To address the problems in the prior art, the present invention provides an indirect heating pyrolysis device for oily sludge.

[0005] The technical solution adopted by the present invention to solve its technical problem is: an indirect heating pyrolysis device for oily sludge, including a tank body, a feed pipe fixedly connected inside the tank body, an inner tank fixedly connected to the lower end of the feed pipe, and a stirring mechanism for stirring the oily sludge inside the inner tank, the stirring mechanism including a conical sleeve. The outer surface of the conical sleeve is provided with an inner spiral auger, and the inner surface of the conical sleeve is provided with an outer spiral auger. The upper end of the conical sleeve is provided with a cleaning mechanism for cleaning the inner wall of the inner tank, and the cleaning mechanism includes a scraper. The lower end of the scraper is provided with a discharge mechanism to discharge the pyrolyzed sludge from the device. By setting the conical sleeve to a conical shape and the inner wall of the inner tank to a conical shape, the flowing sludge can fit more closely to the heat transfer surface of the inner tank under the action of gravity. The inclined surface of the conical sleeve and the inclined surface of the inner tank provide support for the flow of sludge driven by the outer spiral auger. The conical sleeve can also stir the flowing sludge in the inner tank.

[0006] Preferably, an air inlet pipe is fixedly connected to the lower end of the tank, and an exhaust pipe is fixedly connected to the upper end of the tank.

[0007] Preferably, an air extraction pipe is fixedly connected to the upper end of the inner tank.

[0008] Preferably, the stirring mechanism includes an electric motor, the non-output end of the electric motor is fixedly connected to the tank body, the output end of the electric motor is fixedly connected to a first rotating shaft, the surface of the first rotating shaft is fixedly connected to a first spur gear, and one end of the first spur gear meshes with a second spur gear.

[0009] Preferably, the stirring mechanism further includes a second rotating shaft, the center of the second spur gear is fixedly connected to the second rotating shaft, the surface of the second rotating shaft is fixedly connected to a first connecting pipe, one end of the first connecting pipe is fixedly connected to the conical sleeve, the inner wall of the conical sleeve is fixedly connected to a second connecting pipe, and one end of the second connecting pipe is fixedly connected to the second rotating shaft.

[0010] Preferably, the lower end of the scraper is fixedly connected to the conical sleeve, and the surface of the scraper is infinitely close to but not in contact with the inner wall of the inner tank.

[0011] Preferably, the unloading mechanism includes an inclined block, the center of which is rotatably connected to the second rotating shaft, and the lower end of the second rotating shaft is fixedly connected to the inner ring of a sealed bearing.

[0012] Preferably, the unloading mechanism further includes a fixed pipe, the outer ring of the sealed bearing is fixedly connected to the fixed pipe, the surface of the inclined block is fixedly connected to a circular pipe, one end of the circular pipe is fixedly connected to a discharge port, the upper end of the circular pipe is fixedly connected to the lower end of the inner tank, and a spiral rod is provided inside the circular pipe, the spiral rod is fixedly connected to the surface of the second rotating shaft.

[0013] The beneficial effects of this invention are: (1) The indirect heating pyrolysis device for oily sludge described in this invention is designed with an inclined inner tank wall, which allows the oily sludge to be continuously pushed upward along the inclined inner tank wall. At the same time, the oily sludge in the central area of ​​the inner tank flows downward synchronously, forming a bidirectional circulation motion state. This allows the oily sludge to circulate and contact the heat transfer surface in all directions, which completely solves the problem of the oily sludge in the central area being far from the heat source and not being fully pyrolyzed. It effectively avoids the situation of local drying and carbonization without internal pyrolysis. The inclined heat transfer surface can also increase the contact area of ​​the oily sludge, making the material more evenly heated and greatly improving the overall pyrolysis efficiency and pyrolysis thoroughness.

[0014] (2) The indirect heating pyrolysis device for sludge described in this invention adopts a dual indirect heating method. The external tank is filled with hot air to transfer heat from the outside to the inner tank. The inner tank can be filled with hot air to transfer heat from the inside to the core area. After the hot air completes the heat exchange in the core area, it can flow back to the external tank for reuse, forming a heat energy recycling mode, maximizing the heat energy utilization rate, reducing heat loss and energy input. The dual heating structure realizes three-dimensional encapsulation heating of sludge, with a faster heat transfer rate. While improving the processing efficiency, it significantly reduces the energy consumption cost of the overall pyrolysis operation.

[0015] (3) The present invention provides an indirect heating pyrolysis device for sludge. By setting the conical sleeve to be conical and matching it with the inner tank, the inner wall of the inner tank is set to be conical so that the flowing sludge can fit more closely to the heat transfer surface of the inner tube under the action of gravity. The inclined surface of the conical sleeve and the inclined surface of the inner tank provide support for the flow of sludge driven by the outer spiral auger. The conical sleeve can provide a heat source for heating the sludge at the center of the inner tank as a heat transfer source. The conical sleeve can also stir the sludge flowing in the conical sleeve. The conical sleeve can also drive the sludge in the inner tank to circulate and clean the sludge attached to the inner wall of the inner tank. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 A schematic diagram of the connection structure between the tank body and the feed pipe; Figure 3 This is a sectional view of the overall structure; Figure 4 This is a schematic diagram of the connection structure between the inner tank and the extraction pipe. Figure 5 This is a schematic diagram of the connection structure between the second rotating shaft and the first connecting pipe; Figure 6 This is a schematic diagram of the connection structure between the first connecting pipe and the tapered sleeve; Figure 7This is a schematic diagram of the connection structure between the second rotating shaft and the second connecting pipe; Figure 8 This is a schematic diagram of the connection structure between the conical sleeve and the scraper.

[0018] In the diagram: 100, tank body; 101, air inlet pipe; 102, exhaust pipe; 200, feed pipe; 300, inner tank; 301, exhaust pipe; 400, stirring mechanism; 401, electric motor; 402, first rotating shaft; 403, first spur gear; 404, second spur gear; 405, second rotating shaft; 406, first connecting pipe; 407, conical sleeve; 408, second connecting pipe; 500, inner spiral auger; 600, outer spiral auger; 700, cleaning mechanism; 701, scraper; 800, unloading mechanism; 801, inclined block; 802, sealed bearing; 803, fixed pipe; 804, round pipe; 805, discharge port; 806, spiral rod. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0020] like Figures 1-8 As shown, an indirect heating pyrolysis device for oily sludge according to the present invention includes a tank 100, a feed pipe 200 fixedly connected inside the tank 100, an inner tank 300 fixedly connected to the lower end of the feed pipe 200, and a stirring mechanism 400 for stirring the oily sludge inside the inner tank 300, the stirring mechanism 400 including a conical sleeve 407. The outer surface of the tapered sleeve 407 is provided with an inner spiral auger 500, and the inner surface of the tapered sleeve 407 is provided with an outer spiral auger 600. The upper end of the conical sleeve 407 is provided with a cleaning mechanism 700 for cleaning the inner wall of the inner tank 300. The cleaning mechanism 700 includes a scraper 701. The lower end of the scraper 701 is provided with a discharge mechanism 800 for discharging the pyrolyzed sludge from the device. By setting the conical sleeve 407 into a conical shape and the inner wall of the inner tank 300 into a conical shape, the flowing sludge can fit more closely to the heat transfer surface of the inner tank 300 under the action of gravity. The inclined surface of the conical sleeve 407 and the inclined surface of the inner tank 300 cooperate to provide support for the flow of sludge driven by the outer spiral auger 600. The conical sleeve 407 can also stir the sludge flowing in the inner tank 300.

[0021] Specifically, an air inlet pipe 101 is fixedly connected to the lower end of the tank 100, and an exhaust pipe 102 is fixedly connected to the upper end of the tank 100.

[0022] In addition, an air extraction pipe 301 is fixedly connected to the upper end of the inner tank 300.

[0023] It should be noted that the stirring mechanism 400 includes a motor 401. The non-output end of the motor 401 is fixedly connected to the tank 100. The output end of the motor 401 is fixedly connected to a first rotating shaft 402. A first spur gear 403 is fixedly connected to the surface of the first rotating shaft 402. A second spur gear 404 meshes with one end of the first spur gear 403. A second rotating shaft 405 is fixedly connected to the center of the second spur gear 404. A first connecting pipe 406 is fixedly connected to the surface of the second rotating shaft 405. One end of the first connecting pipe 406 is connected to... A conical sleeve 407 is fixedly connected, and a second connecting pipe 408 is fixedly connected to the inner wall of the conical sleeve 407. One end of the second connecting pipe 408 is fixedly connected to the second rotating shaft 405. The sludge is poured into the inner tank 300 through the feed pipe 200, and hot air is introduced into the tank 100 through the air inlet pipe 101. During the pyrolysis process, the oil and gas inside the inner tank are extracted through the air extraction pipe 301. The inner wall of the inner tank 300 is inclined, which allows the sludge to have more complete contact with the inner wall of the inner tank 300.

[0024] Specifically, when the motor 401 is started and rotates forward, the first rotating shaft 402 will rotate, which in turn will drive the first spur gear 403 to rotate, which in turn will drive the second spur gear 404 to rotate, which in turn will drive the second rotating shaft 405 to rotate, which in turn will drive the first connecting pipe 406 to rotate, which in turn will drive the conical sleeve 407 to rotate, which in turn will drive the second connecting pipe 408 to rotate, and the rotation of the second rotating shaft 405 will drive both the first and second connecting pipes 406 and 408 to rotate, which will stir the sludge and oil in the inner tank 300.

[0025] It is worth mentioning that while the conical sleeve 407 is rotating, it will drive the inner spiral auger 500 to rotate. The rotation of the inner spiral auger 500 will cause the sludge inside the conical sleeve 407 to flow downward.

[0026] It should be noted that while the conical sleeve 407 is rotating, it will also drive the outer spiral auger 600 to rotate. The rotation of the outer spiral auger 600, in conjunction with the conical sleeve 407, will cause the sludge at the bottom of the inner tank 300 to move upward.

[0027] Specifically, the lower end of the scraper 701 is fixedly connected to the conical sleeve 407, and the surface of the scraper 701 is very close to but not in contact with the inner wall of the inner tank 300. When the conical sleeve 407 rotates, it will also drive the scraper 700 to rotate. The rotation of the scraper 700 will clean the inner wall of the inner tank 300 and prevent the upper inner wall of the inner tank 300 from being covered with sludge and oil.

[0028] It should be noted that the unloading mechanism 800 includes an inclined block 801, the center of which is rotatably connected to the second rotating shaft 405. The lower end of the second rotating shaft 405 is fixedly connected to the inner ring of a sealing bearing 802, and the outer ring of the sealing bearing 802 is fixedly connected to a fixed tube 803. A circular tube 804 is fixedly connected to the surface of the inclined block 801, and one end of the circular tube 804 is fixedly connected to a discharge port 805. The upper end of the circular tube 804 is fixedly connected to the lower end of the inner tank 300. A spiral rod 806 is provided inside the circular tube 804, and the spiral rod 806 is fixedly connected to the surface of the second rotating shaft 405. When the second rotating shaft 405 rotates in the forward direction, it will drive the inner spiral auger 500 and the outer spiral auger 600 to rotate in the forward direction. The forward rotation of the inner spiral auger 500 will drive the sludge inside the conical sleeve 407 to flow downward. The outer spiral auger 600 rotates in the forward direction, pushing the oily sludge at the bottom of the inner tank 300 upwards. The outer spiral auger 600 also pushes the oily sludge upwards along the inclined inner wall of the inner tank 300. This allows the oily sludge to circulate and contact the inclined inner wall of the inner tank 300, preventing incomplete pyrolysis of the oily sludge in the center of the inner tank 300. This is because the oily sludge in the center of the inner tank 300 is far from the inner tank 300, and the oily sludge on the inner wall of the inner tank 300 has already dried and hardened, while the oily sludge in the center of the inner tank 300... Before the sludge has been completely pyrolyzed, the inner wall of the inner tank 300 is a heat source for intermittent heat transfer. The circulating contact between the sludge and the inclined inner wall of the inner tank 300 can accelerate the pyrolysis efficiency of the sludge. The hot air introduced into the fixed pipe 803 will enter the conical sleeve 407. The conical sleeve 407 is set inside the inner tank 300. The conical sleeve 407 can improve the pyrolysis efficiency of the sludge in the inner tank 300. The conical sleeve 407 can also provide support for the sludge on the external spiral auger 600.

[0029] Specifically, hot air is introduced into the fixed pipe 803. The hot air passes through the sealed bearing 802 and enters the second rotating shaft 405. The hot air inside the rotating shaft 405 passes through the second connecting pipe 408 and enters the conical sleeve 407. The hot air inside the conical sleeve 407 passes through the first connecting pipe 406 and enters the second rotating shaft 405. The hot air inside the second rotating shaft 405 enters the tank 100. While the second rotating shaft 405 is rotating, it also drives the screw rod 806 to rotate. The rotation of the screw rod 806 drives the sludge inside the circular pipe 804 to move upward.

[0030] It should be noted that when the motor 401 reverses, the motor 401 will drive the second rotating shaft 405 to rotate. The rotation of the second rotating shaft 405 will drive the screw rod 806 to rotate. The rotation of the screw rod 806 will push the sludge inside the inner tank 300 downward. The sludge is squeezed and flows downward, and is discharged from the equipment through the discharge port 805.

[0031] Specifically, when the motor 401 reverses, it will also drive the outer spiral auger 600 to rotate in the opposite direction. The reverse rotation of the outer spiral auger 600 will work with the conical sleeve 407 to push the sludge on the inner wall of the inner tank 300 downward, so as to prevent the sludge from adhering to the inner wall of the inner tank 300.

[0032] Working principle: When using this invention, the sludge is poured into the inner tank 300 through the feed pipe 200, and hot air is introduced into the tank 100 through the air inlet pipe 101. During the pyrolysis process, the oil and gas inside the inner tank are extracted through the air extraction pipe 301. The inner wall of the inner tank 300 is inclined, which allows the sludge to have more complete contact with the inner wall of the inner tank 300.

[0033] During the pyrolysis process, the feed pipe 200 and the discharge port 500 of the device are closed, and the evacuation pipe is used to evacuate the oil and gas in the inner tank 300 of the pyrolysis device during the pyrolysis process.

[0034] When the motor 401 is started and rotates forward, it drives the first shaft 402 to rotate. The rotation of the first shaft 402 drives the first spur gear 403 to rotate. The rotation of the first spur gear 403 drives the second spur gear 404 to rotate. The rotation of the second spur gear 404 drives the second shaft 405 to rotate. The rotation of the second shaft 405 drives the first connecting pipe 406 to rotate. The rotation of the first connecting pipe 406 drives the conical sleeve 407 to rotate. The rotation of the conical sleeve 407 drives the second connecting pipe 408 to rotate. The rotation of the second shaft 405 drives the first connecting pipe 406 and the second connecting pipe 408 to rotate. The rotation of the first connecting pipe 406 and the second connecting pipe 408 stirs the sludge in the inner tank 300.

[0035] As the conical sleeve 407 rotates, it drives the inner spiral auger 500 to rotate, and the rotation of the inner spiral auger 500 causes the sludge inside the conical sleeve 407 to flow downward.

[0036] As the conical sleeve 407 rotates, it also drives the outer spiral auger 600 to rotate. The rotation of the outer spiral auger 600, in conjunction with the conical sleeve 407, causes the sludge at the bottom of the inner tank 300 to move upward.

[0037] As the conical sleeve 407 rotates, it also drives the scraper 700 to rotate. The rotation of the scraper 700 cleans the inner wall of the inner tank 300, preventing the upper inner wall of the inner tank 300 from being covered with sludge and oil.

[0038] When the second shaft 405 rotates in the forward direction, it drives the inner spiral auger 500 and the outer spiral auger 600 to rotate in the forward direction. The rotation of the inner spiral auger 500 causes the sludge inside the conical sleeve 407 to flow downward, while the rotation of the outer spiral auger 600 pushes the sludge at the bottom of the inner tank 300 upward. The outer spiral auger 600 also pushes the sludge upward along the inclined inner wall of the inner tank 300. This allows the sludge to circulate and contact the inclined inner wall of the inner tank 300, preventing incomplete pyrolysis of the sludge in the center of the inner tank 300 during the pyrolysis process. The oily sludge in the center is far from the inner tank 300. The oily sludge on the inner wall of the inner tank 300 has dried and hardened, while the oily sludge in the center of the inner tank 300 has not yet been pyrolyzed. The inner wall of the inner tank 300 is a heat source for intermittent heat transfer. The oily sludge circulating in contact with the inclined inner wall of the inner tank 300 can accelerate the pyrolysis efficiency of the oily sludge. The hot air introduced into the fixed pipe 803 will enter the conical sleeve 407. The conical sleeve 407 is set inside the inner tank 300. The conical sleeve 407 can improve the pyrolysis efficiency of the oily sludge in the inner tank 300. The conical sleeve 407 can also provide support for the oily sludge on the external spiral auger 600.

[0039] Hot air is introduced into the fixed pipe 803. The hot air passes through the sealed bearing 802 and enters the second rotating shaft 405. The hot air inside the rotating shaft 405 passes through the second connecting pipe 408 and enters the conical sleeve 407. The hot air inside the conical sleeve 407 passes through the first connecting pipe 406 and enters the second rotating shaft 405. The hot air inside the second rotating shaft 405 enters the tank 100. While the second rotating shaft 405 is rotating, it will also drive the screw rod 806 to rotate. The rotation of the screw rod 806 will drive the sludge inside the round pipe 804 to move upward.

[0040] When the motor 401 reverses, the motor 401 will drive the second shaft 405 to rotate. The rotation of the second shaft 405 will drive the screw rod 806 to rotate. The rotation of the screw rod 806 will push the sludge inside the inner tank 300 downward. The sludge is squeezed and flows downward, and is discharged from the equipment through the discharge port 805.

[0041] When the motor 401 reverses, it will also drive the outer spiral auger 600 to rotate in the opposite direction. The reverse rotation of the outer spiral auger 600 will work with the conical sleeve 407 to push the sludge on the inner wall of the inner tank 300 downward, so as to prevent the sludge from adhering to the inner wall of the inner tank 300.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An indirect heated pyrolysis apparatus for contaminated oil sludge, comprising a tank body (100), characterized in that: The inner part of the tank body (100) is fixedly connected with a feeding pipe (200), the lower end of the feeding pipe (200) is fixedly connected with an inner tank (300), the inner part of the inner tank (300) is provided with a stirring mechanism (400) for stirring the sludge, the stirring mechanism (400) comprises a conical sleeve (407); The outer surface of the conical sleeve (407) is provided with an inner spiral auger (500), and the inner surface of the conical sleeve (407) is provided with an outer spiral auger (600); The upper end of the conical sleeve (407) is provided with a cleaning mechanism (700) for cleaning the inner wall of the inner tank (300), and the cleaning mechanism (700) comprises a scraper (701); The lower end of the scraper (701) is provided with a discharging mechanism (800) for discharging the sludge after pyrolysis in the device. By setting the conical sleeve (407) as a cone and the inner wall of the inner tank (300) as a cone, the flowing sludge can more closely adhere to the heat transfer surface of the inner tank (300) under the action of gravity, the inclined surface of the conical sleeve (407) cooperates with the inclined surface of the inner tank (300) to provide support force for the outer spiral auger (600) to drive the sludge flow, and the conical sleeve (407) can also stir the flowing sludge in the inner tank (300).

2. The apparatus according to claim 1, wherein: The lower end of the tank body (100) is fixedly connected with an air inlet pipe (101), and the upper end of the tank body (100) is fixedly connected with an air outlet pipe (102).

3. The apparatus according to claim 1, wherein: The upper end of the inner tank (300) is fixedly connected with an air exhaust pipe (301).

4. The apparatus according to claim 1, wherein: The stirring mechanism (400) comprises an electric motor (401), the non-output end of the electric motor (401) is fixedly connected with the tank body (100), the output end of the electric motor (401) is fixedly connected with a first rotating shaft (402), the surface of the first rotating shaft (402) is fixedly connected with a first spur gear (403), and one end of the first spur gear (403) is engaged with a second spur gear (404).

5. The apparatus according to claim 1, wherein: The stirring mechanism (400) further comprises a second rotating shaft (405), the center of the second spur gear (404) is fixedly connected with the second rotating shaft (405), the surface of the second rotating shaft (405) is fixedly connected with a first connecting pipe (406), one end of the first connecting pipe (406) is fixedly connected with the conical sleeve (407), the inner wall of the conical sleeve (407) is fixedly connected with a second connecting pipe (408), and one end of the second connecting pipe (408) is fixedly connected with the second rotating shaft (405).

6. The apparatus according to claim 3, wherein: The lower end of the scraper (701) is fixedly connected with the conical sleeve (407), and the surface of the scraper (701) is in close proximity to but not attached to the inner wall of the inner tank (300).

7. The apparatus according to claim 4, wherein: The discharging mechanism (800) comprises an inclined block (801), the center of the inclined block (801) is rotationally connected with the second rotating shaft (405), and the lower end of the second rotating shaft (405) is fixedly connected with the inner ring of a sealing bearing (802).

8. The apparatus according to claim 4, wherein: The discharging mechanism (800) further comprises a fixed tube (803), the outer ring of the sealing bearing (802) is fixedly connected with the fixed tube (803), the surface of the inclined block (801) is fixedly connected with a circular tube (804), one end of the circular tube (804) is fixedly connected with a discharge port (805), the upper end of the circular tube (804) is fixedly connected with the lower end of the inner tank (300), and the inside of the circular tube (804) is provided with a spiral rod (806), and the spiral rod (806) is fixedly connected with the surface of the second rotating shaft (405).

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