Rotary heat extraction barrel

Abstract

The utility model discloses a rotary heat extraction barrel which comprises a cylindrical barrel body, a heat extraction device, a heat extraction device and a heat extraction device, wherein the cylindrical barrel body comprises an inner barrel and an outer barrel; a distance is kept between the outer wall of the inner cylinder and the inner wall of the outer cylinder to form an air duct; when the barrel is arranged on the supporting table, the axis of the barrel and the horizontal plane form a certain angle, so that the vertical heights of the inlet and the outlet are different; the rotation driving device is used for applying rotation force to the barrel body, so that the barrel body rotates on the supporting table in the circumferential direction; the air inlet device is arranged at one end of the air duct, the heat collecting pipeline is arranged at the other end of the air duct and connected with the thermoelectric conversion system, when iron slag with the temperature ranging from 900 DEG C to 500 DEG C enters the inner cylinder of the cylinder body from the inlet, the iron slag in the kiln body rolls along with the inner cylinder to be broken and release heat, and the heat is diffused to the air duct through the wall of the inner cylinder. Air flow blown into the air duct by the air inlet device brings heat to the heat collection pipeline. The heat extraction efficiency is improved.

Description

Technical Field

[0001] This application relates to a heat recovery device, and more particularly to a rotary heat extraction cylinder. Background Technology

[0002] Existing methods for utilizing waste heat from iron slag include heat extraction from molten iron, iron slag, slag pellets, and flue gas. However, these methods generally only recover heat sources with initial temperatures below 500 degrees Celsius, and primarily rely on flue gas convection for heat extraction, making it impossible to directly and efficiently extract heat from iron slag at temperatures above 500 degrees Celsius. Furthermore, they suffer from uncontrollable heat release and excessively long extraction times, leading to heat loss and hindering the maximization of heat utilization. Summary of the Invention

[0003] In view of this, the technical problem to be solved by this application is to provide a rotary heat extraction cylinder to solve the problem that the existing technology cannot directly and efficiently extract heat from iron slag with a temperature higher than 500 degrees Celsius.

[0004] To address the aforementioned problems, this application provides a rotary heat extraction cylinder, comprising: a cylindrical body including an inner cylinder and an outer cylinder; the inner cylinder is fixed inside the outer cylinder by a fixing device, and a distance is maintained between the outer wall of the inner cylinder and the inner wall of the outer cylinder to form an air duct; one end of the cylinder is an inlet, and the other end is an outlet; a support frame device including at least two support platforms arranged in a straight line, the support platforms being used to support the cylinder; when the cylinder is placed on the support platforms, the axis of the cylinder forms a certain angle with the horizontal plane, thereby making the vertical heights of the inlet and outlet different; and a rotation drive device for applying rotational force to the cylinder, causing the cylinder to rotate circumferentially on the support platforms. The system includes a rotating shaft; an air inlet device located at one end of the air duct to blow gas into the air duct, creating an airflow; and a heat collection pipe located at the other end of the air duct and connected to a thermoelectric conversion system. The heat collection pipe collects the hot airflow flowing out of the air duct and transfers it to the thermoelectric conversion system. When slag from steelmaking with a temperature between 900℃ and 500℃ enters the inner cylinder from the inlet, the rotating drive device drives the cylinder to rotate circumferentially. The slag inside the cylinder rolls and is broken up, releasing heat. The heat diffuses or is conducted through the inner cylinder wall to the air duct. The airflow blown into the air duct by the air inlet device carries the heat to the heat collection pipe.

[0005] The rotary heat extraction cylinder of this application is suitable for heat extraction from medium-high temperature iron slag with a temperature between 900℃ and 500℃. The iron slag, initially in a semi-fluid, semi-solid state, enters the cylinder. The slag is tumbled and impacted within the cylinder, releasing heat. This heat is collected through the air duct and converted into electrical energy by the thermoelectric conversion system. The entire processing environment is relatively closed and independent, with high heat utilization, large single-pass processing capacity, and extremely high processing efficiency. It reduces the processing time for medium-high temperature iron slag at 900℃-500℃ from 12 hours to 60 minutes compared to existing technologies. Furthermore, compared to the existing water-spraying heat extraction method, it saves water and is more environmentally friendly. Heat release can also be controlled as needed: 1) When heat is not needed, the double cylinder acts as an insulation device to store heat; 2) When heat is needed, the cylinder rotation speed and air duct ventilation volume are controlled to provide the required heat for production. Attached Figure Description

[0006] Figure 1 The image shown is a front view of a rotary heat extraction cylinder provided in one embodiment of this application;

[0007] Figure 2 for Figure 1 A side view of the rotary heat extraction cylinder of the embodiment shown;

[0008] Figure 3 for Figure 1 A partial cross-sectional view of the rotary heat extraction cylinder of the illustrated embodiment;

[0009] Figure 4 A front view of a slag-breaking plate provided in one embodiment of this application;

[0010] Figure 5 This is a side view of a slag-breaking plate provided in one embodiment of this application. Detailed Implementation

[0011] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer and more understandable, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit the scope of this application.

[0012] In this application, terms referring to orientation, such as up, down, top, bottom, inside, outside, high, and low, are based on the position of the rotary heat extraction cylinder in its operating state.

[0013] In this application, the proximal end is the end closest to the cylinder inlet, and the distal end is the end furthest from the cylinder inlet.

[0014] This application provides a rotary heat extraction cylinder, comprising: a cylindrical body, the body including an inner cylinder and an outer cylinder; the inner cylinder is fixed inside the outer cylinder by a fixing device, and a distance is maintained between the outer wall of the inner cylinder and the inner wall of the outer cylinder to form an air duct; one end of the cylinder is an inlet, and the other end is an outlet; a support frame device including at least two support platforms arranged in a straight line, the support platforms being used to support the cylinder; when the cylinder is placed on the support platforms, the axis of the cylinder forms a certain angle with the horizontal plane, thereby making the vertical heights of the inlet and outlet different; a rotation drive device for applying rotational force to the cylinder, causing the cylinder to rotate circumferentially on the support platforms. The air inlet device, located at one end of the air duct, is used to blow gas into the air duct to create an airflow. The heat collection pipe, located at the other end of the air duct and connected to the thermoelectric conversion system, is used to collect the hot airflow flowing out of the air duct and transfer it to the thermoelectric conversion system. When slag from steelmaking with a temperature between 900℃ and 500℃ enters the inner cylinder of the cylinder from the inlet, the rotating drive device drives the cylinder to rotate circumferentially. The slag inside the cylinder rolls and is broken up, releasing heat. The heat diffuses through the inner cylinder wall to the air duct, and the airflow blown into the air duct by the air inlet device carries the heat to the heat collection pipe.

[0015] In one embodiment, the inner wall of the inner cylinder is provided with a slag-breaking component, which swings as the cylinder rotates, thereby moving and striking the iron slag inside the inner cylinder.

[0016] In one embodiment, the slag breaking component is a plurality of chain segments suspended on the inner wall of the inner cylinder, with the plurality of chains arranged in an array on the inner wall of the inner cylinder.

[0017] In one embodiment, both ends of each chain segment are fixed to the inner wall of the inner cylinder, and the length of the chain segment is greater than the distance between the two ends of the chain segment.

[0018] In one embodiment, the slag breaking component consists of multiple slag breaking plates arranged in an array on the inner wall of the inner cylinder. The slag breaking plates are hinged to the inner wall of the inner cylinder, causing them to swing as the cylinder rolls.

[0019] In one embodiment, the slag-breaking plate is a perforated plate, and a serrated edge is provided on the side away from the inner wall of the inner cylinder.

[0020] In one embodiment, the serrated edge is perpendicular to the plane of the slag-breaking plate.

[0021] In one embodiment, the slag breaking component comprises multiple chain segments and multiple slag breaking plates. The chain segments are suspended from the inner wall of the inner cylinder, and the slag breaking plates are hinged to the inner wall of the inner cylinder. The multiple slag breaking plates and multiple chain segments are arranged in an array on the inner wall of the inner cylinder, with the slag breaking plates and chain segments arranged alternately.

[0022] In one embodiment, a slag scraping assembly is also included, disposed at the inlet of the cylinder, comprising a support and a slag scraper; the bottom of the support is fixed to the ground, and the top of the support is fixed to the slag scraper; the slag scraper extends through the cylinder inlet and into the cylinder; one side of the slag scraper is close to the inner wall of the inner cylinder; when the cylinder rotates, the slag scraper rotates relative to the cylinder and moves the slag inside the cylinder from the inlet toward the center of the cylinder.

[0023] In one embodiment, an arc-shaped fixing plate is also provided at the top of the bracket for fixing the scraper plate to the top of the bracket; the scraper plate is welded to the far end of the arc-shaped fixing plate and the plane of the scraper plate is perpendicular to the inner surface of the inner cylinder; the arc-shaped fixing plate has a radius adapted to the inner cylinder.

[0024] In one embodiment, the scraper blade is serrated on the side closest to the inner wall of the inner cylinder.

[0025] In one embodiment, the inner wall of the inner cylinder is provided with multiple spiral protrusions, which are used to guide the slag to roll toward the outlet and to crush the slag when the cylinder rotates.

[0026] In one embodiment, the fixing device includes multiple fixing devices, each fixing device including a metal groove welded to the inner wall of the outer cylinder and an insert plate that cooperates with the metal groove; the inner cylinder wall is provided with insertion holes, the position and number of insertion holes corresponding to the position and number of metal grooves. When the inner cylinder is placed inside the outer cylinder, the insert plate passes through the insertion holes on the inner cylinder wall and is inserted into the corresponding metal groove, thereby fixing the inner cylinder and the outer cylinder together.

[0027] In one embodiment, the surface of the support platform that contacts the cylinder is an arc-shaped surface, and balls or rollers are arranged on the arc-shaped surface.

[0028] In one embodiment, the distance between the outer wall of the inner cylinder and the inner wall of the outer cylinder is 150-250mm.

[0029] In one embodiment, the cylinder is made of cast iron and has a diameter greater than 2200 mm.

[0030] In one embodiment, the outer wall of the outer cylinder is provided with insulation material to prevent heat loss.

[0031] The specific implementation process and technical effects of the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0032] like Figure 1The rotary heat extraction cylinder shown is an embodiment of a rotary heat extraction cylinder, comprising: a cylindrical cylinder 100, at least two support platforms 50, an air inlet device, a heat collection pipe, and a rotation drive device 60. One end of the cylinder 100 is an inlet 101, and the other end is an outlet 102. An air duct is provided inside the cylinder 100. The two support platforms 50 are arranged in a straight line on the ground or a support plane A. The two support platforms are at different heights, so when the cylinder 100 is placed on the support platforms 50, the inlet 101 and outlet 102 of the cylinder 100 are at different heights. The surface of the support platform 50 that contacts the cylinder is an arc-shaped surface, and ball bearings or rollers are arranged on the arc-shaped surface. When the rotation drive device 60 drives the cylinder 100 to rotate, the ball bearings or rollers on the arc-shaped surface facilitate the rotation of the cylinder. Generally, the height of the inlet 101 is higher than the height of the outlet 102. The rotation drive device 60 is used to apply rotational force to the cylinder, causing the cylinder to rotate circumferentially on the support platforms. An air inlet device (not shown in the figure) is located at one end of the air duct, and a heat collection pipe (not shown in the figure) is located at the other end of the cylinder. Generally, the air inlet device is located at the inlet end of the cylinder to blow gas into the air duct, creating an airflow within the duct. The heat collection pipe is located at the outlet to collect the hot airflow flowing out of the air duct and transfer it to the thermoelectric conversion system. A negative pressure machine can also be installed at the end of the heat collection pipe to accelerate the process of heat transfer from the air duct to the heat collection pipe. The cylinder 100 is made of cast iron with a diameter greater than 2200 mm. In one embodiment, the inner cylinder has a diameter of 2200 mm, the outer cylinder has an outer diameter of 2492 mm, and a wall thickness of 50 mm. The rotary heat extraction cylinder also includes a slag scraping assembly (not shown in the figure), located at the inlet 101 of the cylinder 100, including a support and a slag scraper; the bottom of the support is fixed to the ground A, and the top of the support is fixed to the slag scraper; in one embodiment, the top of the support is also provided with an arc-shaped fixing plate, which has a radius adapted to the inner cylinder, for fixing the slag scraper to the top of the support. The scraper plate is welded to the far end of the arc-shaped fixed plate, with its plane perpendicular to the inner surface of the inner cylinder. The scraper plate extends into the cylinder 100 through the inlet 101. One side (the bottom edge) of the scraper plate is close to the inner wall of the inner cylinder. The side of the scraper plate closest to the inner wall is serrated, so that when the cylinder 100 rotates, the scraper plate rotates relative to the cylinder, causing the slag inside the cylinder to move from the inlet towards the center of the cylinder. When slag from steelmaking, with a temperature between 900℃ and 500℃, enters the inner cylinder through the inlet, the rotating drive device drives the cylinder to rotate circumferentially. The slag inside the cylinder rolls and is crushed, breaking, and releasing heat. The heat diffuses or is transferred to the air duct through the inner cylinder wall. The airflow blown into the air duct by the air inlet device carries the heat to the heat collection pipe. After the slag is crushed and tumbled by the rotary heat extraction cylinder, it releases heat, causing the temperature to drop to around 300℃. The slag is then discharged from the outlet, awaiting processing in the next heat recovery stage.

[0033] like Figure 2 and 3 As shown, the cylinder 100 also includes an inner cylinder 20 and an outer cylinder 10; the inner cylinder 20 is fixed inside the outer cylinder 10 by a plurality of fixing devices 30, and a distance is maintained between the outer wall of the inner cylinder 20 and the inner wall of the outer cylinder 10 to form an air duct 70; in one embodiment, the distance between the outer wall of the inner cylinder 20 and the inner wall of the outer cylinder 10 is 150mm-250mm. The fixing devices 30 are welded to the inner wall of the outer cylinder and include a metal groove and an insert plate 31 that mates with the metal groove; and the inner cylinder 20 has insertion holes on its cylinder wall, the position and number of which correspond to the position and number of the metal groove, such as Figure 2 As shown, after the inner cylinder 20 is fitted inside the outer cylinder 10, the insertion hole on the inner cylinder 20 is aligned with the position of the metal groove. The metal groove separates the inner cylinder 20 and the outer cylinder 10 by a certain distance, thus forming the air duct 70. Then, the insert plate is inserted into the insertion hole on the inner cylinder wall and then into the corresponding position of the metal groove, thereby fixing the inner cylinder 20 and the outer cylinder 10 together.

[0034] like Figure 3 As shown, the inner wall of the inner cylinder 20 is provided with multiple spiral protrusions 21. When the cylinder rotates, the spiral protrusions 21 guide the slag to roll towards the outlet. When the slag rolls and falls onto the protrusions 21, it breaks the slag. Furthermore, the inner wall of the inner cylinder 20 is also provided with multiple slag-breaking components. In one embodiment, the slag-breaking components are multiple chain segments 41 suspended from the inner wall of the inner cylinder. The two ends of each chain segment 41 are fixed to the inner wall of the inner cylinder, and the length of the chain segment is greater than the distance between the two ends of the chain segment. The chain segments 41 are arranged in an array on the inner wall of the inner cylinder, and the fixed ends of adjacent chain segments 41 overlap, so that the chain segments cover as much space as possible on the inner wall of the inner cylinder, which facilitates full contact with the slag. The chain segments 41 swing as the cylinder rotates, thereby agitating and striking the slag in the inner cylinder and breaking it.

[0035] In one embodiment, combined with Figure 3 , Figure 4 and Figure 5 As shown, the slag-breaking component consists of multiple slag-breaking plates 42, arranged in an array on the inner wall of the inner cylinder 20. A shaft hole is provided on the inner wall of the inner cylinder 20, and a hinge shaft 423 is provided at the end of each slag-breaking plate 42. Inserting the hinge shaft 423 into the shaft hole on the inner wall of the inner cylinder 20 achieves hinged connection between the slag-breaking plate 42 and the inner wall of the inner cylinder. When the cylinder 100 rotates, the slag-breaking plates 42 swing along with the rotation of the cylinder 100. Figure 4As shown, the slag-breaking plate 42 includes a main plate 421 and a serrated edge 422. The main plate 421 is a perforated plate, and the serrated edge 422 is perpendicular to the main plate 421, so that when the slag-breaking plate 42 swings, the serrations on the serrated edge 422 can directly strike the iron slag, thus achieving a better slag-breaking effect. In one embodiment, the slag-breaking component consists of multiple chain segments and multiple slag-breaking plates. The multiple slag-breaking plates and multiple chain segments are arranged in an array on the inner wall of the inner cylinder, with the slag-breaking plates and chain segments arranged alternately.

[0036] The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but this does not limit the scope of the invention. Those skilled in the art can implement the present invention in various modifications without departing from its scope and spirit; for example, a feature of one embodiment can be used in another embodiment to obtain yet another embodiment. Any modifications, equivalent substitutions, and improvements made within the scope of the present invention should be within the scope of the present invention.

Claims

1. A rotary heat extraction cylinder, characterized in that... include: A cylindrical tube, comprising an inner tube and an outer tube; the inner tube is fixed inside the outer tube by a fixing device, and a distance is maintained between the outer wall of the inner tube and the inner wall of the outer tube to form an air duct; one end of the tube is an inlet and the other end is an outlet; A support frame device includes at least two support platforms arranged in a straight line, which are used to support the cylinder. When the cylinder is placed on the support platform, the axis of the cylinder forms a certain angle with the horizontal plane, so that the vertical heights of the inlet and outlet are different. A rotation drive device is used to apply rotational force to the cylinder, causing the cylinder to rotate circumferentially on the support platform; An air inlet device is provided at one end of the air duct and is used to blow gas into the air duct to create an airflow inside the air duct. A heat collection pipe is located at the other end of the air duct and connected to the thermoelectric conversion system. The heat collection pipe is used to collect the hot air flowing out of the air duct and transmit it to the thermoelectric conversion system. When slag from steelmaking with a temperature between 900℃ and 500℃ enters the inner cylinder of the cylinder through the inlet, the rotation drive device drives the cylinder to rotate circumferentially. The slag inside the cylinder then rolls and is broken up, releasing heat. The heat diffuses through the inner cylinder wall to the air duct, and the airflow blown into the air duct by the air inlet device carries the heat to the heat collection pipe.

2. The rotary heat extraction cylinder according to claim 1, characterized in that: The inner wall of the inner cylinder is provided with a slag-breaking component, which swings as the cylinder rotates, thereby moving and striking the iron slag inside the inner cylinder.

3. The rotary heat extraction cylinder according to claim 2, characterized in that: The slag breaking component consists of multiple chain segments suspended from the inner wall of the inner cylinder, and the multiple chains are arranged in an array on the inner wall of the inner cylinder.

4. The rotary heat extraction cylinder according to claim 3, characterized in that: Each chain segment has its two ends fixed to the inner wall of the inner cylinder, and the length of the chain segment is greater than the distance between the two ends of the chain segment.

5. The rotary heat extraction cylinder according to claim 2, characterized in that: The slag breaking component consists of multiple slag breaking plates arranged in an array on the inner wall of the inner cylinder, and the slag breaking plates swing as the cylinder rolls.

6. The rotary heat extraction cylinder according to claim 5, characterized in that: The slag-breaking plate is a perforated plate, and a serrated edge is provided on the side away from the inner wall of the inner cylinder.

7. The rotary heat extraction cylinder according to claim 6, characterized in that: The serrated edge is perpendicular to the plane of the slag-breaking plate.

8. The rotary heat extraction cylinder according to claim 2, characterized in that: The slag breaking component consists of multiple chain segments and multiple slag breaking plates. The chain segments are suspended from the inner wall of the inner cylinder, and the slag breaking plates are hinged to the inner wall of the inner cylinder. The multiple slag breaking plates and multiple chain segments are arranged in an array on the inner wall of the inner cylinder, with the slag breaking plates and chain segments arranged alternately.

9. The rotary heat extraction cylinder according to claim 1, characterized in that: It also includes a slag scraping assembly, which is set at the inlet of the cylinder, including a bracket and a slag scraper; the bottom of the bracket is fixed to the ground, and the top of the bracket is fixed to the slag scraper; the slag scraper extends into the cylinder through the inlet; one side of the slag scraper is close to the inner wall of the inner cylinder; when the cylinder rotates, the slag scraper rotates relative to the cylinder and moves the slag in the cylinder from the inlet toward the center of the cylinder.

10. The rotary heat extraction cylinder according to claim 9, characterized in that: The top of the support is also provided with an arc-shaped fixing plate for fixing the scraper plate to the top of the support; the scraper plate is welded to the far end of the arc-shaped fixing plate and the plane of the scraper plate is perpendicular to the inner surface of the inner cylinder; the arc-shaped fixing plate has a radius adapted to the inner cylinder.

11. The rotary heat extraction cylinder according to claim 10, characterized in that: The scraper blade is serrated on the side closest to the inner wall of the inner cylinder.

12. The rotary heat extraction cylinder according to claim 1, characterized in that: The inner wall of the inner cylinder is provided with multiple spiral protrusions, which are used to guide the iron slag to roll towards the outlet and to crush the iron slag when the cylinder rotates.

13. The rotary heat extraction cylinder according to claim 1, characterized in that: The fixing device includes multiple devices, each device including a metal groove welded to the inner wall of the outer cylinder and an insert plate that mates with the metal groove; the inner cylinder has insertion holes on its wall, the position and number of the insertion holes corresponding to the position and number of the metal grooves; when the inner cylinder is placed inside the outer cylinder, the insert plate passes through the insertion holes on the inner cylinder wall and is inserted into the corresponding metal groove, thereby fixing the inner cylinder and the outer cylinder together.

14. The rotary heat extraction cylinder according to claim 1, characterized in that: The surface of the support platform that contacts the cylinder is an arc-shaped surface, and ball bearings or rollers are arranged on the arc-shaped surface.

15. The rotary heat extraction cylinder according to claim 1, characterized in that: The distance between the outer wall of the inner cylinder and the inner wall of the outer cylinder is 150-250mm.

16. The rotary heat extraction cylinder according to claim 1, characterized in that: The cylinder is made of cast iron and has a diameter greater than 2200mm.

17. The rotary heat extraction cylinder according to claim 1, characterized in that: The outer wall of the outer cylinder is insulated to prevent heat loss.

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