A screw shaft and a screw conveying device of a pyrolysis furnace

Abstract

The utility model discloses a kind of helical shaft and helical conveying equipment of pyrolysis furnace, helical shaft includes helical shaft body, helical shaft body one end is equipped with connecting structure, connecting structure is equipped with liquid inlet and liquid outlet, helical shaft body is along the first passage and second passage of axial direction, first passage one end is communicated with second passage one end, first passage other end is communicated with the liquid inlet of connecting structure, second passage other end is communicated with the liquid outlet of connecting structure;Helical conveying equipment driving motor is placed in one end of underframe, and is connected with helical shaft by main shaft, barrel is placed in the other end of underframe and is sleeved in the outer periphery of helical shaft, barrel is equipped with feed inlet and discharge outlet, feed inlet is close to one side of driving motor, discharge outlet is away from one side of driving motor, there is empty cylinder section in the barrel between discharge outlet and helical shaft, counterweight door is hingedly arranged in empty cylinder section. Cooling medium is relatively more uniform to the cooling effect of helical shaft body both ends.

Description

Technical Field

[0001] This utility model relates to the field of spiral conveying technology, and in particular to a spiral conveying device for a spiral shaft and a pyrolysis furnace. Background Technology

[0002] Pyrolysis equipment technology refers to the continuous heating of materials at a specific temperature in a container in the absence of oxygen, causing the carbon molecules in the materials to break down and eventually form fine granular carbon powder, thereby reducing, rendering harmless, and recycling toxic and harmful substances.

[0003] When slag is discharged from the pyrolysis furnace, it is necessary to cool the discharged slag. The existing cooling method is to set up cooling channels on the outer shell of the pyrolysis furnace. This technology can cool the discharged slag, but the contact area for cooling is limited and the cooling effect is generally average. Utility Model Content

[0004] The purpose of this utility model is to provide a spiral shaft and a spiral conveying device for a pyrolysis furnace, which solves the problems of limited contact area and mediocre cooling effect of existing slag cooling devices.

[0005] This utility model is implemented as follows: This utility model provides a spiral shaft, including a spiral shaft body. One end of the spiral shaft body is provided with a connecting structure, and the connecting structure is provided with a liquid inlet and a liquid outlet. The spiral shaft body is provided with a first channel and a second channel along the axial direction. One end of the first channel is connected to one end of the second channel, the other end of the first channel is connected to the liquid inlet of the connecting structure, and the other end of the second channel is connected to the liquid outlet of the connecting structure.

[0006] The cooling medium enters the first channel from the inlet and flows axially along the first channel to one end of the spiral shaft. Then it enters the second channel and flows in the opposite direction to the cooling medium in the first channel, continuing to cool the outer periphery of the spiral shaft body until the cooling medium flows out from the other end of the second channel to the outlet. After heat exchange between the cooling medium at the inlet and the outer periphery of the spiral shaft body, the cooling medium returns to the outlet, completing the cooling process. During this process, the cooling effect of the cooling medium on both ends of the spiral shaft body is relatively more uniform.

[0007] A further technical solution of this utility model is that the liquid outlet is located close to the spiral shaft body, and the liquid inlet is located away from the spiral shaft body. This makes the liquid inlet closer to the drive motor, resulting in a better cooling effect on the transmission-related parts.

[0008] A further technical solution of this utility model is: the cross-sectional area of ​​the first channel is equal to the cross-sectional area of ​​the inner diameter of the liquid inlet, the cross-sectional area of ​​the second channel is equal to the cross-sectional area of ​​the inner diameter of the liquid outlet, and the cross-sectional area of ​​the first channel is equal to the cross-sectional area of ​​the second channel.

[0009] This design ensures that the cooling medium is always effectively involved in cooling, without stagnating in the water channel, resulting in high cooling efficiency. The first and second channels are only connected at their ends. Compared to the annular water channel used in existing technologies, this invention provides a sealed space between the first and second channels, preventing the cooling medium from entering and reducing the weight of the spiral shaft.

[0010] A further technical solution of this utility model is that the cross-sectional shape of the first channel and the second channel is a narrow, elongated arc shape. This shape increases the contact area between the cooling medium and the outer shell of the spiral shaft body, thereby improving the cooling effect. A further technical solution of this utility model is that the connecting structure includes a shaft body, which is connected to the end of the spiral shaft body via a connecting ring. The shaft body is provided with an inlet channel and an outlet channel, which are connected to the first channel and the second channel via the connecting ring.

[0011] After the medium enters through the inlet, it passes through the inlet channel and then enters the first channel through the channel between the connecting ring and the shaft body. After passing through the first channel, it enters the second channel. The connecting ring fixes the shaft body and the spiral shaft body without affecting the flow of the medium between the connecting structure and the spiral shaft body.

[0012] A further technical solution of this utility model is: the connection structure further includes a double-channel spiral connector, the double-channel spiral connector is sleeved on the shaft body, the inner wall of the double-channel spiral connector has two annular grooves, the liquid inlet and liquid outlet are arranged radially along the double-channel spiral connector and are respectively connected to the two annular grooves, and the two annular grooves are respectively connected to the liquid inlet channel and the liquid outlet channel.

[0013] This utility model also provides a spiral conveying device for a pyrolysis furnace, including a base frame, a drive motor, a main shaft, a cylinder, and a counterweight door. The drive motor is located at one end of the base frame and is connected to the spiral shaft through the main shaft. The cylinder is located at the other end of the base frame and is sleeved on the outer circumference of the spiral shaft. The cylinder is provided with a feed inlet and a discharge outlet. The feed inlet is closer to the drive motor, and the discharge outlet is farther away from the drive motor. There is a hollow cylindrical section inside the cylinder between the discharge outlet and the spiral shaft. The counterweight door is hinged inside the hollow cylindrical section.

[0014] Material enters the cylinder through the feed inlet, and then the drive motor drives the screw shaft to rotate through the main shaft, so that the material is conveyed in the cylinder until the material is squeezed in the empty cylindrical section to form a material seal. When the material reaches a certain amount, it squeezes open the counterweight gate and is discharged from the discharge outlet.

[0015] A further technical solution of this utility model is: the main shaft is connected at one end to the output end of the drive motor and at the other end to the spiral shaft body through a connecting structure.

[0016] The output end of the drive motor rotates, transmitting power to the main shaft. The main shaft drives the rotating shaft body to rotate. The main shaft is connected to the rotating shaft body through a connecting structure. The connecting structure is equipped with inlet and outlet ports to facilitate the entry and exit of the medium and remove the heat from the spiral shaft body.

[0017] A further technical solution of this utility model is: one end of the connecting structure connected to the spiral shaft body is placed inside the cylinder, and the other end of the connecting structure is provided with a liquid inlet and a liquid outlet placed outside the cylinder.

[0018] The spiral shaft body is inside the cylinder, and the drive motor is outside the cylinder. The drive motor and the spiral shaft body are connected by a main shaft and a connecting structure in sequence to achieve transmission. The connecting structure has an inlet and an outlet at one end, which is placed outside the cylinder. It is easy to process and assemble, and easy to operate. In addition, after the cooling medium is introduced into the connecting structure of this utility model, the inlet is close to the bearing and the drive motor transmission components, which can prevent the transmission components from getting too hot.

[0019] A further technical solution of this utility model is: the counterweight door is hinged and set above the cylinder at the connection between the discharge port and the empty cylindrical section. The counterweight door blocks and compacts the material in the empty cylindrical section. After the material accumulates and fills the empty cylindrical section, it forms a material plug, forming a self-sealing material. The material plug pushes open the counterweight door and is discharged from the discharge port on the cylinder.

[0020] The counterweight gate is installed inside the cylinder at the connection between the discharge port and the empty cylindrical section. The counterweight gate compacts the material in the empty cylindrical section. After the material accumulates and fills the empty cylindrical section, it forms a material plug. The material itself self-seals, eliminating the need for a slide gate valve or unloader, thus solving the problem of jamming in sealing equipment.

[0021] A further technical solution of this utility model is: the spiral shaft body is provided with spiral blades, and the spiral blades gradually become denser along the direction from the feed inlet to the discharge outlet.

[0022] The spiral blades at the feed inlet end use a large pitch, while those at the discharge outlet end use a small pitch, which facilitates the rapid accumulation of material in the empty cylindrical section to form a material seal.

[0023] The beneficial effects of this invention are as follows: The cooling medium enters the first channel from the inlet and then flows axially along the first channel to one end of the spiral shaft body. It then enters the second channel and flows in the opposite direction to the cooling medium in the first channel, continuing to cool the outer periphery of the spiral shaft body along the spiral shaft body until the cooling medium flows out from the other end of the second channel to the outlet. After heat exchange between the cooling medium and the outer periphery of the spiral shaft body from the inlet, the cooling medium returns to the outlet, completing the cooling process. During this process, the cooling effect of the cooling medium on both ends of the spiral shaft body is relatively more uniform. Attached Figure Description

[0024] Figure 1This is a schematic diagram of the structure of a spiral shaft provided by this utility model;

[0025] Figure 2 This is a top view of a spiral shaft provided by this utility model;

[0026] Figure 3 This is the AA cross-sectional view provided by this utility model;

[0027] Figure 4 This is a cross-sectional view of BB provided by this utility model;

[0028] Figure 5 This is a CC cross-sectional view provided by this utility model;

[0029] Figure 6 This is a schematic diagram of the structure of a spiral conveyor device for a pyrolysis furnace provided by this utility model.

[0030] Reference numerals: 1. Helical shaft body; 11. First channel; 12. Second channel; 13. Helical blade.

[0031] 2. Connecting structure; 21. Liquid inlet; 22. Liquid outlet; 23. Shaft; 231. Liquid inlet channel; 232. Liquid outlet channel; 24. Connecting ring; 25. Double-channel spiral joint; 26. Annular groove.

[0032] 101. Base frame, 102. Drive motor, 103. Main shaft, 104. Cylinder, 105. Counterweight door, 106. Screw shaft. Detailed Implementation

[0033] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0034] Example 1:

[0035] like Figure 1-5 The spiral shaft shown includes a spiral shaft body 1. One end of the spiral shaft body 1 is provided with a connecting structure 2. The connecting structure 2 is provided with an inlet 21 and an outlet 22. The spiral shaft body 1 has a first channel 11 and a second channel 12 along the axial direction. One end of the first channel 11 is connected to one end of the second channel 12. The other end of the first channel 11 is connected to the inlet 21 of the connecting structure 2. The other end of the second channel 12 is connected to the outlet 22 of the connecting structure 2.

[0036] In this embodiment, the two ends of the spiral shaft body are solid, and the middle part is hollow, in order to reduce weight.

[0037] In this embodiment, the spiral shaft body is cooled by an external cooling medium. The spiral shaft body has internal cooling water channels, and its vertical cross-section is divided into three spaces: a central space, a first channel, and a second channel. The cross-sectional areas of the first and second channels are equal to the cross-sectional areas of the inlet and outlet water pipes, ensuring that the cooling water medium is always effectively involved in cooling without stagnating within the channels, resulting in high cooling efficiency. The central space is sealed to prevent the entry of cooling water medium, reducing the weight of the spiral shaft.

[0038] In this embodiment, the liquid outlet 22 is located close to the spiral shaft body 1, and the liquid inlet 21 is located away from the spiral shaft body 1.

[0039] In this embodiment, the cross-sectional area of ​​the first channel 11 is equal to the inner diameter cross-sectional area of ​​the liquid inlet 21, the cross-sectional area of ​​the second channel 12 is equal to the inner diameter cross-sectional area of ​​the liquid outlet 22, and the cross-sectional area of ​​the first channel 11 is equal to the cross-sectional area of ​​the second channel 12.

[0040] This design ensures that the cooling medium is always effectively involved in cooling, without stagnating in the water channel, resulting in high cooling efficiency. The first and second channels are only connected at their ends. Compared to the annular water channel used in existing technologies, this invention provides a sealed space between the first and second channels, preventing the cooling medium from entering and reducing the weight of the spiral shaft.

[0041] In this embodiment, the cross-sectional shape of the first channel 11 and the second channel 12 is a narrow, elongated arc shape. This shape increases the contact area between the cooling medium and the outer shell of the screw body, resulting in better cooling performance.

[0042] In this embodiment, the connecting structure 2 includes a shaft 23, which is connected to the end of the spiral shaft body 1 via a connecting ring 24. The shaft 23 is provided with an inlet channel 231 and an outlet channel 232, which are connected to the first channel 11 and the second channel 12 via the connecting ring 24.

[0043] After the medium enters through the inlet, it passes through the inlet channel and then enters the first channel through the channel between the connecting ring and the shaft body. After passing through the first channel, it enters the second channel. The connecting ring fixes the shaft body and the spiral shaft body without affecting the flow of the medium between the connecting structure and the spiral shaft body.

[0044] In this embodiment, the connection structure 2 further includes a dual-channel spiral connector 25, which is sleeved on the shaft 23. The inner wall of the dual-channel spiral connector 25 has two annular grooves 26. The liquid inlet 21 and the liquid outlet 22 are arranged radially along the dual-channel spiral connector 25 and are respectively connected to the two annular grooves 26. The two annular grooves 26 are respectively connected to the liquid inlet channel 231 and the liquid outlet channel 232.

[0045] In this embodiment, the spiral shaft body 1 is a cantilevered spiral with a shaft.

[0046] Example 2:

[0047] like Figure 1-6 The spiral conveyor of a pyrolysis furnace shown includes a base frame 101, a drive motor 102, a main shaft 103, a cylinder 104, and a counterweight door 105. The drive motor 102 is located at one end of the base frame 101 and is connected to the spiral shaft 106 described in Embodiment 1 via the main shaft 103. The cylinder 104 is located at the other end of the base frame 101 and is sleeved on the outer circumference of the spiral shaft 106. The cylinder 104 is provided with a feed inlet and a discharge outlet. The feed inlet is located on the side closer to the drive motor 102, and the discharge outlet is located on the side farther away from the drive motor 102. There is a hollow cylindrical section inside the cylinder 104 between the discharge outlet and the spiral shaft 106. The counterweight door 105 is hinged inside the hollow cylindrical section.

[0048] Material enters the cylinder through the feed inlet, and then the drive motor drives the screw shaft to rotate through the main shaft, so that the material is conveyed in the cylinder until the material is squeezed in the empty cylindrical section to form a material seal. When the material reaches a certain amount, it squeezes open the counterweight gate and is discharged from the discharge outlet.

[0049] In this embodiment, the main shaft 103 is connected at one end to the output end of the drive motor 102 and at the other end to the spiral shaft body 1 through the connecting structure 2.

[0050] The output end of the drive motor rotates, transmitting power to the main shaft. The main shaft drives the rotating shaft body to rotate. The main shaft is connected to the rotating shaft body through a connecting structure. The connecting structure is equipped with inlet and outlet ports to facilitate the entry and exit of the medium and remove the heat from the spiral shaft body.

[0051] In this embodiment, the drive motor is a geared motor.

[0052] In this embodiment, the output end of the drive motor 102 is connected to the main shaft 103 through a bearing housing assembly, and the main shaft 103 is connected to the connecting structure 2 through another bearing housing assembly.

[0053] In this embodiment, one end of the connecting structure 2 connected to the spiral shaft body 1 is placed inside the cylinder 104, and the other end of the connecting structure 2 is provided with an inlet 21 and an outlet 22 located outside the cylinder 104. The inlet 21 is close to the main shaft 103, and the outlet 22 is close to the spiral shaft body 1.

[0054] The spiral shaft body is inside the cylinder, and the drive motor is outside the cylinder. The drive motor and the spiral shaft body are connected by a main shaft and a connecting structure in sequence to achieve transmission. The connecting structure has an inlet and an outlet at one end, which is placed outside the cylinder. It is easy to process and assemble, and easy to operate. In addition, after the cooling medium is introduced into the connecting structure of this utility model, the inlet is close to the bearing and the drive motor transmission components, which can prevent the transmission components from getting too hot.

[0055] In this embodiment, the counterweight door 105 is hinged and located above the inner part of the cylinder 104 at the connection between the discharge port and the empty cylindrical section. The counterweight door 105 blocks and compacts the material in the empty cylindrical section. After the material accumulates and fills the empty cylindrical section, it forms a material plug, which forms a self-sealing material. The material plug pushes open the counterweight door 105 and is discharged from the discharge port on the cylinder 104.

[0056] The counterweight gate is installed inside the cylinder at the connection between the discharge port and the empty cylindrical section. The counterweight gate compacts the material in the empty cylindrical section. After the material accumulates and fills the empty cylindrical section, it forms a material plug. The material itself self-seals, eliminating the need for a slide gate valve or unloader, thus solving the problem of jamming in sealing equipment.

[0057] In this embodiment, the spiral shaft body 1 is provided with spiral blades 13, which gradually become denser along the feed inlet toward the discharge outlet.

[0058] The spiral blades at the feed inlet end use a large pitch, while those at the discharge outlet end use a small pitch, which facilitates the rapid accumulation of material in the empty cylindrical section to form a material seal.

[0059] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A helical shaft comprising a helical shaft body (1), characterized in that: The spiral shaft body (1) is provided with a connecting structure (2) at one end. The connecting structure (2) is provided with an inlet (21) and an outlet (22). The spiral shaft body (1) is provided with a first channel (11) and a second channel (12) along the axial direction. One end of the first channel (11) is connected to one end of the second channel (12). The other end of the first channel (11) is connected to the inlet (21) of the connecting structure (2). The other end of the second channel (12) is connected to the outlet (22) of the connecting structure (2).

2. A helical shaft as claimed in claim 1, wherein: The liquid outlet (22) is located close to the spiral shaft body (1), and the liquid inlet (21) is located away from the spiral shaft body (1).

3. A helical shaft as claimed in claim 2, wherein: The cross-sectional area of ​​the first channel (11) is equal to the inner diameter cross-sectional area of ​​the inlet (21), the cross-sectional area of ​​the second channel (12) is equal to the inner diameter cross-sectional area of ​​the outlet (22), and the cross-sectional area of ​​the first channel (11) is equal to the cross-sectional area of ​​the second channel (12).

4. A helical shaft as claimed in claim 3, wherein: The cross-sectional shape of the first channel (11) and the second channel (12) is a narrow arc shape.

5. A helical shaft according to any one of claims 1 to 4, wherein: The connecting structure (2) includes a shaft (23), which is connected to the end of the spiral shaft body (1) via a connecting ring (24). The shaft (23) is provided with an inlet channel (231) and an outlet channel (232), which are connected to the first channel (11) and the second channel (12) via the connecting ring (24).

6. A helical shaft as claimed in claim 5, wherein: The connection structure (2) also includes a double-channel spiral connector (25), which is sleeved on the shaft (23). The inner wall of the double-channel spiral connector (25) has two annular grooves (26). The inlet (21) and outlet (22) are arranged radially along the double-channel spiral connector (25) and are respectively connected to the two annular grooves (26). The two annular grooves (26) are respectively connected to the inlet channel (231) and the outlet channel (232).

7. A screw conveyor apparatus for a pyrolysis furnace, characterized by: The device includes a base frame (101), a drive motor (102), a main shaft (103), a cylinder (104), and a counterweight door (105). The drive motor (102) is located at one end of the base frame (101) and is connected to the spiral shaft (106) as described in any one of claims 1-6 via the main shaft (103). The cylinder (104) is located at the other end of the base frame (101) and is sleeved on the outer circumference of the spiral shaft (106). The cylinder (104) is provided with a feed inlet and a discharge outlet. The feed inlet is located on the side closer to the drive motor (102), and the discharge outlet is located on the side away from the drive motor (102). There is a hollow cylindrical section inside the cylinder (104) between the discharge outlet and the spiral shaft (106). The counterweight door (105) is hinged inside the hollow cylindrical section.

8. A screw conveyor apparatus for a pyrolysis furnace as claimed in claim 7, wherein: One end of the connecting structure (2) connected to the spiral shaft body (1) is placed inside the cylinder (104), and the other end of the connecting structure (2) is provided with an inlet (21) and an outlet (22) placed outside the cylinder (104).

9. A screw conveyor apparatus for a pyrolysis furnace as claimed in claim 7, wherein: The counterweight gate (105) is hinged to the upper part of the cylinder (104) at the connection between the discharge port and the empty cylindrical section. The counterweight gate (105) blocks and compacts the material in the empty cylindrical section. After the material accumulates and fills the empty cylindrical section, it forms a material plug, which forms a material self-sealing. The material plug pushes open the counterweight gate (105) and is discharged from the discharge port on the cylinder (104).

10. A screw conveyor apparatus for a pyrolysis furnace as claimed in claim 7, characterized in that: The spiral shaft body (1) is provided with spiral blades (13), and the spiral blades (13) gradually become denser along the feed inlet to the discharge outlet.

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