Spiral feeding device for heat recovery

Abstract

The utility model relates to the technical field of high-temperature organic waste feeding, and discloses a spiral feeding device for heat recovery, which comprises a spiral blade group, the spiral blade group comprises a front-section spiral blade, a middle-section spiral blade and a rear-section spiral blade, two ends of the middle-section spiral blade, which are far away from each other, are respectively connected with the front-section spiral blade and the rear-section spiral blade; the spiral blade set further comprises a reinforcing rod used in cooperation with the front-section spiral blade and a transmission shaft used in cooperation with the rear-section spiral blade, the front-section spiral blade is arranged around the reinforcing rod in a spiral extending mode, and the rear-section spiral blade is arranged around the transmission shaft in a spiral extending mode. The high-temperature organic solid waste with the highest temperature value is stirred through the front-section spiral blade, and then the high-temperature organic solid waste is spread through the middle-section spiral blade, so that the dispersion effect on the high-temperature organic solid waste is improved, and meanwhile, the service life of the spiral feeding device is prolonged; and finally, the high-temperature organic solid waste is pushed through the rear-section spiral blade, so that the materials are cooled and discharged.

Description

Technical Field

[0001] The utility model relates to the technical field of high-temperature organic waste feeding, and particularly relates to a spiral feeding device for heat recovery. Background Art

[0002] When heat is recovered from high-temperature organic solid waste, the high-temperature organic solid waste needs to be put into a heat recovery cylinder, and the high-temperature organic solid waste in the recovery cylinder is stirred to enable heat exchange between the high-temperature organic solid waste and the recovery cylinder, thereby realizing heat energy recovery. In the prior art, a stirring rod is used to stir the high-temperature organic solid waste. During the stirring process, part of the heat energy of the high-temperature organic solid waste will be transferred to the stirring rod. Generally, the high-temperature organic solid waste has a temperature of about 500 °C, and the end of the stirring rod that first contacts the high-temperature organic solid waste is usually extremely prone to deformation due to the action of high temperature and weight, thereby easily reducing the stirring effect and resulting in a reduction in heat recovery efficiency. Therefore, improvement is needed. Summary of the Utility Model

[0003] The main object of the utility model is to propose a spiral feeding device for heat recovery, aiming to provide a spiral feeding device with high strength and efficient feeding.

[0004] To achieve the above object, the utility model proposes a spiral feeding device for heat recovery, including a spiral blade group. The spiral blade group includes a front-section spiral blade, a middle-section spiral blade, and a rear-section spiral blade. The two ends of the middle-section spiral blade that are far away from each other are respectively connected to the front-section spiral blade and the rear-section spiral blade. The spiral blade group further includes a reinforcing rod used in cooperation with the front-section spiral blade and a transmission shaft used in cooperation with the rear-section spiral blade. The front-section spiral blade spirally extends around the reinforcing rod, and the rear-section spiral blade spirally extends around the transmission shaft.

[0005] Specifically, the spiral feeding device for heat recovery further includes a driving member for driving the spiral blade group to rotate. The front-section spiral blade is used to drive the external material to be conveyed to the rear-section spiral blade via the middle-section spiral blade. The pitch of the middle-section spiral blade is greater than the pitch of the front-section spiral blade.

[0006] Specifically, a plurality of reinforcing rib strips are arranged on the spiral blades of the spiral blade group along the circumferential direction. The reinforcing rib strips are spaced apart from each other, and the spacing between the reinforcing rib strips is the same.

[0007] Specifically, the reinforcing rod is made of a high-temperature resistant metal material, and the surface of the front-section spiral blade is coated with a chromium alloy coating.

[0008] Specifically, the thickness of the outer side of the front-section spiral blade is greater than the thickness of the inner side.

[0009] Specifically, there is a thickening part between the outer thickness and the inner thickness of the front-section spiral blade, and the included angle between the thickening part and the vertical axis is between 5° and 8°.

[0010] Specifically, it further includes a recovery cylinder, and a material storage cavity is arranged inside the recovery cylinder. The spiral blade group is rotatably arranged in the material storage cavity. Feed ports and discharge ports are respectively arranged at both ends of the recovery cylinder. The front-section spiral blade is located at the feed port, and the rear-section spiral blade is located at the discharge port.

[0011] Specifically, a connecting rotating shaft is arranged at one end of the material storage cavity close to the feed port of the recovery cylinder, and the end of the reinforcing rod is connected to the connecting rotating shaft. An installation through hole is arranged at one end of the material storage cavity close to the discharge port of the recovery cylinder, and the transmission shaft passes through the installation through hole and extends outside the material storage cavity.

[0012] Specifically, the pitch of the front-section spiral blade is greater than or equal to 200 mm, and the pitch of the middle-section spiral blade is greater than or equal to 400 mm.

[0013] Specifically, the feed port and the discharge port are respectively arranged at both ends of the recovery cylinder. The opening of the feed port is arranged upward, and the opening of the discharge port is arranged downward.

[0014] In the technical solution of the present utility model, the spiral blade group is divided into a front-section spiral blade, a middle-section spiral blade and a rear-section spiral blade. At the same time, a reinforcing rod is welded in the middle of the front-section spiral blade, so as to facilitate the feeding of the high-temperature organic solid waste with the highest temperature value through the front-section spiral blade, and then the high-temperature organic solid waste is spread through the middle-section spiral blade, thereby improving the dispersion effect on the high-temperature organic solid waste and at the same time improving the service life of the spiral feeding device. Finally, the high-temperature organic solid waste is pushed through the rear-section spiral blade to realize the cooling and discharging of the high-temperature organic solid waste. Description of the Drawings

[0015] Figure 1 It is a schematic assembly state diagram of the present utility model.

[0016] Figure 2 It is a schematic diagram of the distribution state of the reinforcing ribs of the spiral blade of the present utility model.

[0017] Figure 3 It is a side view cross-sectional view of the spiral blade of the present utility model.

[0018] The reference numerals include: 10, spiral blade group; 11, front-section spiral blade; 111, outer side; 112, inner side; 113, thickening part; 12, middle-section spiral blade; 13, rear-section spiral blade; 14, reinforcing rod; 15, transmission shaft; 16, reinforcing rib; 20, driving member; 30, recovery cylinder; 31, feed port; 32, discharge port; 33, material storage cavity. Detailed implementation mode

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] As Figures 1 to 3 shown, a spiral feeding device for heat recovery includes a spiral blade group 10. The spiral blade group 10 includes a front-section spiral blade 11, a middle-section spiral blade 12, and a rear-section spiral blade 13. The two ends of the middle-section spiral blade 12 away from each other are respectively connected to the front-section spiral blade 11 and the rear-section spiral blade 13. The spiral blade group 10 further includes a reinforcing rod 14 used in cooperation with the front-section spiral blade 11 and a transmission shaft 15 used in cooperation with the rear-section spiral blade 13. The front-section spiral blade 11 spirally extends around the reinforcing rod 14, and the rear-section spiral blade 13 spirally extends around the transmission shaft 15. When performing heat recovery on high-temperature organic solid waste, since the high-temperature organic solid waste entering the recovery cylinder 30 has just been discharged from the gas-solid separation chamber of the pyrolysis furnace, its temperature is the highest. The front-section spiral blade provided with the reinforcing rod 14 is used to stir and feed the high-temperature organic solid waste. The reinforcing rod can prevent the front-section spiral blade from deforming due to high temperature. During the movement of the high-temperature organic solid waste in the recovery cylinder 30, its temperature will relatively decrease. When feeding the high-temperature organic solid waste through the middle-section spiral blade 12, at the same time during the feeding process, since there is no reinforcing rod 14 at the central axis of the middle-section spiral blade 12, the filling coefficient of the high-temperature organic solid waste in the recovery cylinder 30 is effectively reduced when passing through the middle-section spiral blade 12, which can increase the spreading area of the high-temperature organic solid waste in the recovery barrel, enhance the disturbance and dispersion degree of the high-temperature organic solid waste, realize the full heat dissipation of the high-temperature organic solid waste, and thus facilitate improving the heat recovery efficiency of the high-temperature organic solid waste. Finally, the high-temperature organic solid waste moves to the rear-section spiral blade 13 and is discharged from the recovery cylinder through the push of the rear-section spiral blade 13.

[0021] The screw feeding device for heat recovery further includes a driving member 20 for driving the screw blade group 10 to rotate. The front-section screw blade 11 is used to drive the external materials to be conveyed to the rear-section screw blade 13 via the middle-section screw blade 12. The pitch of the middle-section screw blade 12 is greater than that of the front-section screw blade 11. The pitch of the front-section screw blade 11 is greater than or equal to 200 mm, and the pitch of the middle-section screw blade 12 is greater than or equal to 400 mm. In this embodiment, a pitch of 200 mm is adopted for the front-section screw blade 11 to facilitate the feeding of high-temperature organic solid waste. At the same time, the smaller pitch can effectively improve the strength of the front-section screw blade 11, thereby improving the high-temperature resistance and anti-bending property of the front-section screw blade 11. A pitch of 400 mm is adopted for the middle-section screw blade 12 to facilitate reducing the filling coefficient of the high-temperature organic solid in the area of the middle-section screw blade 12 of the recovery cylinder 30, thereby improving the disturbance and dispersion degree of the high-temperature organic solid waste and facilitating the improvement of the heat recovery efficiency.

[0022] A plurality of reinforcing rib strips 16 are arranged along the circumferential direction on the screw blades of the screw blade group 10, and the reinforcing rib strips 16 are arranged at intervals from each other, and the intervals between the reinforcing rib strips 16 are the same. In this embodiment, by arranging a plurality of reinforcing rib strips 16 in the circumferential direction of the screw blade, the plurality of reinforcing rib strips 16 strengthen the circumferential direction of the screw blade, thereby improving the anti-bending strength of the screw blade group 10. Similarly, the strength of the screw blade group 10 can also be improved by arranging a plurality of reinforcing rib strips 16 in the radial direction of the screw blade, or by arranging the reinforcing rib strips 16 in both the radial direction and the circumferential direction of the screw blade at the same time. However, since too many reinforcing rib strips 16 themselves will increase the overall weight of the screw blade group 10, resulting in inconvenient installation and rotation, or requiring a driving member 20 with a higher output power, thereby increasing the heat recovery cost. Therefore, in this embodiment, only a plurality of reinforcing rib strips 16 are arranged in the circumferential direction, strengthening the strength of the screw blade group 10 while balancing the recovery cost.

[0023] The reinforcing rod 14 is made of a high-temperature resistant metal material, and the surface of the front-section screw blade 11 is coated with a chromium alloy coating. In this embodiment, the reinforcing rod 14 is made of a high-temperature resistant metal material, thereby improving the service life of the reinforcing rod 14. At the same time, the surface of the front-section screw blade 11 is coated with a chromium alloy coating, further improving the high-temperature resistance effect of the front-section screw blade 11.

[0024] The thickness of the outer side 111 of the front-stage spiral blade 11 is greater than that of the inner side 112; there is a thickening portion 113 between the thickness of the outer side 111 and the inner side 112 of the front-stage spiral blade 11, and the included angle between the thickening portion 113 and the vertical axis is between 5° and 8°. In this embodiment, a thickening portion 113 is provided on the outer side 111 of the front-stage spiral blade 11. Through the thickening portion 113, the material feeding effect of the front-stage spiral blade 11 can be improved, and at the same time, the anti-bending strength of the front-stage spiral blade 11 is strengthened through the thickening portion 113, thereby improving the service life of the front-stage spiral blade 11.

[0025] It further includes a recovery cylinder 30. A material containing cavity 33 is provided in the recovery cylinder 30. The spiral blade group 10 is rotatably arranged in the material containing cavity 33. Feed inlets 31 and discharge outlets 32 are respectively provided at both ends of the recovery cylinder 30. The front-stage spiral blade 11 is located at the feed inlet 31, and the rear-stage spiral blade 13 is located at the discharge outlet 32. In this embodiment, a material containing cavity 33 is provided in the recovery cylinder 30. The high-temperature organic solid waste is stored and heat-recovered through the material containing cavity 33. Then, a spiral blade group 10 is provided in the material containing cavity 33. The driving member 20 is in transmission connection with the rear-end spiral blade, thereby driving the spiral blade group 10 to rotate. The high-temperature organic solid waste enters the material containing cavity 33 through the feed inlet 31, and then the front-stage spiral blade 11 feeds the high-temperature organic solid waste to the middle-stage spiral blade 12. Then, the middle-stage spiral blade 12 feeds the high-temperature organic solid waste in the direction of the rear-end spiral blade, and enables the high-temperature organic solid waste to be discharged from the discharge outlet 32 after cooling, thereby realizing the heat-recovery feeding of the high-temperature organic solid waste.

[0026] A connecting rotating shaft is provided at one end of the material containing cavity 33 close to the feed inlet 31 of the recovery cylinder 30. The end of the reinforcing rod 14 is connected to the connecting rotating shaft. An installation through hole is provided at one end of the material containing cavity 33 close to the discharge outlet 32 of the recovery cylinder 30. The transmission shaft 15 passes through the installation through hole and extends outside the material containing cavity 33. In this embodiment, a connecting rotating shaft is provided in the material containing cavity 33. The end of the reinforcing rod 14 is connected to the connecting rotating shaft to realize the rotation of the spiral blade group 10 in the material containing cavity 33.

[0027] The recovery cylinder 30 includes an inner cylinder and an outer cylinder sleeved on the outer side 111 of the inner cylinder. The material containing cavity 33 is formed inside the inner cylinder. The outer cylinder is provided on the outer wall of the inner cylinder, and a heat exchange cavity is formed between the outer wall of the inner cylinder and the inner wall of the outer cylinder. In this embodiment, the heat exchange cavity is used to facilitate the heat exchange collection of the heat of the high-temperature organic solid waste to improve the heat recovery efficiency.

[0028] The feed inlet 31 and the discharge outlet 32 are respectively arranged at both ends of the recovery cylinder 30. The opening of the feed inlet 31 is upward, and the opening of the discharge outlet 32 is downward. In this embodiment, the recovery cylinder 30 is inclined. At the same time, the feed inlet 31 is arranged at the lower end of the recovery cylinder 30 and the opening is upward, so as to facilitate the high-temperature organic solid waste to enter the material storage cavity 33 of the recovery cylinder 30 through the feed inlet 31. Then the discharge outlet 32 is arranged at the upper end of the recovery cylinder 30 and the opening is downward. When pushing the high-temperature organic solid waste, the inclined recovery cylinder 30 will give a gravity to the high-temperature organic solid. So that when the high-temperature organic solid waste moves from the feed inlet 31 to the discharge outlet 32, relying on the thrust given by the pusher and the gravity, a force that fits the inner wall of the material storage cavity 33 will be formed, so as to realize that the high-temperature organic solid waste always clings to the inner wall of the material storage cavity 33 during the movement, thereby improving the heat conduction efficiency between the material storage cavity 33 and the heat exchange cavity and improving the heat recovery efficiency.

[0029] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A spiral feeding device for heat recovery, comprising a spiral blade group (10), wherein the spiral blade group (10) comprises a front spiral blade (11), a middle spiral blade (12) and a rear spiral blade (13), wherein two ends of the middle spiral blade (12) which are far from each other are respectively connected to the front spiral blade (11) and the rear spiral blade (13), and characterized in that: The spiral blade group (10) further comprises a reinforcing rod (14) used in conjunction with the front spiral blade (11) and a transmission shaft (15) used in conjunction with the rear spiral blade (13); the front spiral blade (11) is spirally extended around the reinforcing rod (14), and the rear spiral blade (13) is spirally extended around the transmission shaft (15).

2. A heat recovery spiral feeding device according to claim 1, characterized in that: The heat recovery spiral feeding device also includes a driving member (20) for driving the spiral blade group (10) to rotate, wherein the front spiral blade (11) is used to drive external materials to be transported to the rear spiral blade (13) via the middle spiral blade (12), and the pitch of the middle spiral blade (12) is greater than the pitch of the front spiral blade (11).

3. The heat recovery spiral feeding device according to claim 1, characterized in that: The spiral blades of the spiral blade group (10) are provided with a plurality of reinforcing ribs (16) arranged along the latitudinal direction, the reinforcing ribs (16) are arranged at intervals from each other, and the spacing between the reinforcing ribs (16) is the same.

4. The heat recovery spiral feeding device according to claim 1, characterized in that: The reinforcing rod (14) is made of a high-temperature resistant metal material, and the surface of the front spiral blade (11) is coated with a chrome alloy plating layer.

5. The heat recovery spiral feeding device according to claim 1, characterized in that: The thickness of the outer side (111) of the front spiral blade (11) is greater than the thickness of the inner side (112).

6. The heat recovery spiral feeding device according to claim 5, characterized in that: A thickened portion (113) exists between the thickness of the outer side (111) and the thickness of the inner side (112) of the front spiral blade (11), and the angle between the thickened portion (113) and the vertical axis is between 5° and 8°.

7. The heat recovery spiral feeding device according to claim 1, characterized in that: The invention also comprises a recovery cylinder (30), wherein a material containing chamber (33) is provided in the recovery cylinder (30), wherein the spiral blade group (10) is rotatably arranged in the material containing chamber (33), and wherein a feed port (31) and a discharge port (32) are respectively provided at two ends of the recovery cylinder (30), wherein the front spiral blade (11) is located at the feed port (31), and the rear spiral blade (13) is located at the discharge port (32).

8. The heat recovery spiral feeding device according to claim 7, characterized in that: A connecting shaft is provided at one end of the material holding chamber (33) close to the material inlet (31) of the recovery cylinder (30), and the end of the reinforcing rod (14) is connected to the connecting shaft. A mounting through hole is provided at one end of the material holding chamber (33) close to the material outlet (32) of the recovery cylinder (30), and the transmission shaft (15) extends to the outside of the material holding chamber (33) through the mounting through hole.

9. The heat recovery spiral feeding device according to claim 7, characterized in that: The feed port (31) and the discharge port (32) are respectively arranged at two ends of the recovery cylinder (30), the opening of the feed port (31) is arranged upward, and the opening of the discharge port (32) is arranged downward.

10. The heat recovery spiral feeding device according to claim 2, characterized in that: The pitch of the front spiral blade (11) is greater than or equal to 200 mm, and the pitch of the middle spiral blade (12) is greater than or equal to 400 mm.

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