A waste heat recovery device for a petroleum coke calcining furnace

Abstract

The present invention discloses a waste heat recovery device for a petroleum coke calcining discharge furnace, which relates to the technical field of waste heat recovery and comprises a discharge furnace, a conical discharge port, an air sleeve, a heat conducting mechanism, and an installation mechanism. The present invention sets a heat conducting mechanism and an installation mechanism. When installing the air sleeve, the connecting block is inserted into the connecting groove, and the fixed block is displaced into the fixed groove, thereby installing the air sleeve. After completion, the rotating ring is rotated to drive the movable block to displace, and the movable block is displaced and contacts the fixed block, thereby reinforcing the air sleeve. When installing the mounting frame, the air sleeve is reinforced again to prevent the air sleeve from loosening during use. The material of the aluminum shell and the aluminum plate is aluminum, which has a good heat conducting effect. At the same time, through multiple aluminum plates, the contact area between the wind and the material is increased, thereby improving the efficiency of heat collection, and facilitating the improvement of the efficiency of the air sleeve in recovering heat from the discharge port.

Description

Technical Field

[0001] The invention relates to the technical field of waste heat recovery, in particular to a waste heat recovery device for a petroleum coke calcining discharge furnace. Background Art

[0002] The petroleum coke calcining discharge furnace is the end of petroleum coke calcination. A conical discharge port is provided below the petroleum coke calcining discharge furnace. The calcined petroleum coke needs to be cooled at the conical discharge port. The existing practice is to set a cooling water jacket outside the conical discharge port and then discharge the water in the water jacket.

[0003] According to announcement number CN204007172U, a grid-type waste heat recovery device for a petroleum coke calcining discharge furnace is provided, comprising a petroleum coke calcining discharge furnace, a conical discharge port located below the petroleum coke calcining discharge furnace, and an air jacket covering the conical discharge port. The air jacket is provided with a plurality of staggered grids, dividing the interior of the air jacket into a tortuous cavity. The inlet and outlet ends of the cavity are respectively connected to an air inlet duct and an air outlet duct, and an induced draft fan and heat recovery equipment are connected in series between the air inlet duct and the air outlet duct. Because the air jacket covers the conical discharge port, the temperature of the material in the conical discharge port is reduced by heating the air inside the air jacket. The energy is carried out by the wind and utilized by the heat recovery equipment, completing the reuse of waste heat energy and improving energy utilization.

[0004] However, the air jacket is in direct contact with the conical discharge port for waste heat recovery, and the contact area of ​​the air jacket is limited, resulting in low efficiency in heat recovery. In order to improve the efficiency of the air jacket in heat recovery from the discharge port, a waste heat recovery device for a petroleum coke calcining discharge furnace is provided. Summary of the Invention

[0005] The purpose of the present invention is to provide a waste heat recovery device for a petroleum coke calcining discharge furnace in order to solve the problem that the contact area of ​​the air jacket is limited, resulting in low efficiency in heat recovery.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a waste heat recovery device for a petroleum coke calcining discharge furnace, comprising a discharge furnace, the bottom end of the discharge furnace is fixedly connected with a conical discharge port, an air sleeve is arranged below the conical discharge port, one end of the air sleeve is connected with an air inlet, and the other end of the air sleeve is connected with an air outlet, a heat conducting mechanism is arranged between the conical discharge port and the air sleeve; the heat conducting mechanism comprises a mounting frame, an aluminum shell, an aluminum plate, a connecting block, a connecting groove, a fixing groove, a fixing block, a fixing spring, a rotating ring, a first bevel gear, a second bevel gear, a third bevel gear, a screw rod and a movable block; the mounting frame is arranged between the conical discharge port and the air sleeve, the aluminum shell is fixedly connected to the bottom end of the mounting frame, the aluminum plate is fixedly connected to the outer wall of the aluminum shell, the connecting block is fixedly connected to the bottom end of the mounting frame and is located at the aluminum On one side of the shell, the connecting groove is opened at the top of the air sleeve, and the fixing groove is opened on the inner wall of the connecting groove; the fixing block is slidably connected to the interior of the connecting block and extends to the outer wall of the connecting block, the fixing spring is connected between the connecting block and the fixing block, the rotating ring is rotatably connected to the outer wall of the mounting bracket, the first bevel gear is rotatably connected to the outer wall of the mounting bracket and is located at the bottom end of the rotating ring, the second bevel gear is fixedly connected to one end of the first bevel gear and is located inside the mounting bracket, the third bevel gear is rotatably connected to the interior of the mounting bracket and is located on the outer wall of the second bevel gear, the screw rod is fixedly connected to one end of the third bevel gear, and the movable block is connected to the outer wall of the screw rod and extends to the interior of the connecting block; a mounting mechanism is provided between the mounting bracket and the discharging furnace.

[0007] As a further solution of the present invention: the mounting mechanism includes an annular groove, a slider, a pushing block, a movable plate, a blocking block, a mounting spring, a push plate, a return spring, a positioning block and a positioning groove; the annular groove is opened on the outer wall of the discharging furnace, the slider is slidably connected to the interior of the mounting frame and extends to the inner wall of the mounting frame, the pushing block is fixedly connected to the outer wall of the sliding block and extends to the outer wall of the mounting frame, the movable plate is slidably connected to the interior of the mounting frame and extends to the top of the mounting frame, the blocking block is slidably connected to the interior of the mounting frame and is located on one side of the movable plate, the mounting spring is connected between the blocking block and the mounting frame, the push plate is slidably connected to the interior of the mounting frame and is located above the rotating ring, the return spring is connected between the push plate and the mounting frame, the positioning block is fixedly connected to the bottom end of the push plate, and the positioning groove is opened at the top of the rotating ring.

[0008] As a further solution of the present invention: the inner wall of the aluminum shell is in contact with the outer wall of the conical discharge port, a plurality of aluminum plates are provided and are equidistantly distributed on the outer wall of the aluminum shell, a first sealing ring is provided at the position where the top end of the air sleeve meets the mounting frame, and a second sealing ring is provided at the position where the bottom end of the inner wall of the air sleeve meets the aluminum shell.

[0009] As a further solution of the present invention: the outer wall of the connecting block fits with the inner wall of the connecting groove, the outer wall of the fixing block fits with the inner wall of the fixing groove, and the fixing block is provided with a semicircular surface at one end of the outer wall of the connecting block.

[0010] As a further solution of the present invention: gear teeth are provided at the bottom end of the rotating ring, the gear teeth are engaged with the first bevel gear, and the second bevel gear is engaged with the third bevel gear.

[0011] As a further solution of the present invention: the inner wall of the movable block is provided with an internal thread, the screw rod matches the internal thread, and the outer wall of the fixed block is located below the movable block and is fixedly connected to a limit plate.

[0012] As a further solution of the present invention: the inner wall of the mounting bracket is in contact with the outer wall of the discharge furnace, and the inner wall of the annular groove is in contact with the outer wall of the sliding block.

[0013] As a further solution of the present invention: a displacement groove for the movable plate to slide is opened inside the mounting frame, and the push plate extends to the inner wall of the displacement groove.

[0014] As a further solution of the present invention: a telescopic column is connected between the push plate and the mounting frame, and the return spring is located on the outer wall of the telescopic column.

[0015] As a further solution of the present invention: a plurality of positioning grooves are provided and are equidistantly distributed on the top of the rotating ring, and the inner wall of the positioning groove fits with the outer wall of the positioning block.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] By setting up a heat conduction mechanism and an installation mechanism, when installing the air sleeve, the connecting block is inserted into the connecting groove, and the fixed block is displaced into the fixed groove, thereby installing the air sleeve. After completion, the rotating ring is rotated to drive the movable block to displace, and the movable block is displaced and contacts the fixed block, thereby reinforcing the air sleeve. When installing the mounting frame, the air sleeve is reinforced again to prevent the air sleeve from loosening during use. The aluminum shell and aluminum plate are made of aluminum, which has good thermal conductivity. At the same time, through multiple aluminum plates, the contact area between wind and material is increased, thereby improving the efficiency of heat collection, which is convenient for improving the efficiency of heat recovery from the outlet by the air sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the installation of the mounting bracket of the present invention;

[0020] Figure 3 This is a schematic diagram of the installation of the air sleeve of the present invention;

[0021] Figure 4 is a cross-sectional view of the air sleeve of the present invention;

[0022] Figure 5 Schematic diagram of the structure of the aluminum shell of the present invention;

[0023] Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle;

[0024] Figure 7 For the present invention Figure 6 Enlarged view of point A in the middle;

[0025] Figure 8 It is a structural schematic diagram of the positioning groove of the present invention;

[0026] Figure 9 It is a cross-sectional view of the slider of the present invention.

[0027] In the figure: 1. discharge furnace; 2. conical discharge port; 3. air sleeve; 4. air inlet; 5. air outlet; 6. heat conduction mechanism; 601. mounting frame; 602. aluminum shell; 603. aluminum plate; 604. connecting block; 605. connecting groove; 606. fixing groove; 607. fixing block; 608. fixing spring; 609. rotating ring; 610. first bevel gear; 611. second bevel gear; 612. third bevel gear; 613. screw rod; 614. movable block; 7. mounting mechanism; 701. annular groove; 702. slider; 703. pushing block; 704. movable plate; 705. clamping block; 706. mounting spring; 707. push plate; 708. reset spring; 709. positioning block; 710. positioning groove; 8. first sealing ring; 9. second sealing ring; 10. limit plate. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figure 1 - Figure 9In an embodiment of the present invention, a waste heat recovery device for a petroleum coke calcining discharge furnace includes a discharge furnace 1, a conical discharge port 2 is fixedly connected to the bottom end of the discharge furnace 1, an air jacket 3 is provided below the conical discharge port 2, one end of the air jacket 3 is connected to an air inlet 4, and the other end of the air jacket 3 is connected to an air outlet 5, and a heat conduction mechanism 6 is provided between the conical discharge port 2 and the air jacket 3; the heat conduction mechanism 6 includes a mounting frame 601, an aluminum shell 602, an aluminum plate 603, a connecting block 604, and a connecting groove 606. 05, fixed groove 606, fixed block 607, fixed spring 608, rotating ring 609, first bevel gear 610, second bevel gear 611, third bevel gear 612, screw 613 and movable block 614; the mounting frame 601 is arranged between the conical discharge port 2 and the air sleeve 3, the aluminum shell 602 is fixedly connected to the bottom end of the mounting frame 601, the aluminum plate 603 is fixedly connected to the outer wall of the aluminum shell 602, the connecting block 604 is fixedly connected to the bottom end of the mounting frame 601 and is positioned On one side of the aluminum shell 602, a connecting groove 605 is opened at the top of the air sleeve 3, and a fixing groove 606 is opened on the inner wall of the connecting groove 605; the fixed block 607 is slidably connected to the interior of the connecting block 604 and extends to the outer wall of the connecting block 604, the fixing spring 608 is connected between the connecting block 604 and the fixed block 607, the rotating ring 609 is rotatably connected to the outer wall of the mounting bracket 601, the first bevel gear 610 is rotatably connected to the outer wall of the mounting bracket 601 and is located at the bottom end of the rotating ring 609, the second bevel gear 611 is fixedly connected to one end of the first bevel gear 610 and is located inside the mounting bracket 601, the third bevel gear 612 is rotatably connected to the interior of the mounting bracket 601 and is located on the outer wall of the second bevel gear 611, the screw rod 613 is fixedly connected to one end of the third bevel gear 612, and the movable block 614 is connected to the outer wall of the screw rod 613 and extends to the interior of the connecting block 604; an installation mechanism 7 is provided between the mounting bracket 601 and the discharge furnace 1.

[0030] In this embodiment: one end of the air inlet 4 is connected to the heat collection equipment through a first pipe, and the air outlet 5 is connected to the heat collection equipment through a second pipe. A fan is installed on the outer wall of the first pipe. The wind enters the interior of the air jacket 3 through the air inlet 4 and is discharged through the air outlet 5. Since the air jacket 3 is covered on the outside of the conical discharge port 2, the temperature of the material in the conical discharge port 2 is reduced by heating the wind inside the air jacket 3, and its energy is carried out by the wind and utilized by the heat collection equipment to complete the reuse of waste heat energy. The material of the aluminum shell 602 and the aluminum plate 603 is aluminum, which has good thermal conductivity. At the same time, through multiple aluminum plates 603, the contact area between the wind and the material is increased, thereby improving the efficiency of heat collection. When installing the air jacket 3, the connecting block 604 is inserted into the connecting groove 605, and the fixed block 607 is displaced by force into the connecting groove. The inside of block 604 squeezes the fixing spring 608 until the fixing block 607 contacts the fixing groove 606. The fixing block 607 is displaced into the fixing groove 606 by the elastic force of the fixing spring 608, thereby installing the air sleeve 3. After completion, the rotating ring 609 is rotated. The rotating ring 609 rotates to drive the first bevel gear 610 to rotate. The first bevel gear 610 rotates to drive the second bevel gear 611 to rotate. The second bevel gear 611 rotates to drive the third bevel gear 612 to rotate. The third bevel gear 612 rotates to drive the screw rod 613 to rotate. The screw rod 613 rotates to drive the movable block 614 to displace. The movable block 614 displaces and contacts the fixed block 607, so that the fixed block 607 has no displacement space and cannot be displaced out of the fixing groove 606, thereby reinforcing the air sleeve 3.

[0031] Please refer to Figure 5 - Figure 9 , the mounting mechanism 7 includes an annular groove 701, a slider 702, a pushing block 703, a movable plate 704, a clamping block 705, a mounting spring 706, a push plate 707, a return spring 708, a positioning block 709 and a positioning groove 710; the annular groove 701 is opened on the outer wall of the discharge furnace 1, the slider 702 is slidably connected to the inside of the mounting frame 601 and extends to the inner wall of the mounting frame 601, the pushing block 703 is fixedly connected to the outer wall of the slider 702 and extends to the outer wall of the mounting frame 601, the movable plate 704 is slidably connected to the inside of the mounting frame 601 and extends to the top of the mounting frame 601, the clamping block 705 Block 705 is slidably connected to the inside of the mounting frame 601 and is located on one side of the movable plate 704. The mounting spring 706 is connected between the block 705 and the mounting frame 601. The push plate 707 is slidably connected to the inside of the mounting frame 601 and is located above the rotating ring 609. The return spring 708 is connected between the push plate 707 and the mounting frame 601. The positioning block 709 is fixedly connected to the bottom end of the push plate 707. The positioning groove 710 is opened at the top of the rotating ring 609. The outer wall of the movable plate 704 is provided with a ratchet, which matches one end of the block 705. The inner wall of the slider 702 is provided with a slope.

[0032] After the locking cam 705 is locked, the locking cam 706 is unlocked and the locking cam 707 is unlocked, and the winch 708 is unlocked.

[0033] Please refer to Figure 1 - Figure 6 The inner wall of the aluminum shell 602 fits with the outer wall of the conical discharge port 2, and several aluminum plates 603 are provided and equidistantly distributed on the outer wall of the aluminum shell 602. A first sealing ring 8 is provided at the position where the top of the air sleeve 3 connects with the mounting frame 601, and a second sealing ring 9 is provided at the position where the bottom end of the inner wall of the air sleeve 3 connects with the aluminum shell 602.

[0034] In this embodiment: when installing the air sleeve 3, the connecting block 604 is inserted into the connecting groove 605, and the fixed block 607 is displaced into the interior of the connecting block 604 by force, and the fixed spring 608 is squeezed until the fixed block 607 contacts the fixed groove 606. The fixed block 607 is displaced into the fixed groove 606 by the elastic force of the fixed spring 608, thereby installing the air sleeve 3. At the same time, the second sealing ring 9 contacts the aluminum shell 602, and the first sealing ring 8 contacts the mounting frame 601, thereby improving the sealing of the air sleeve 3.

[0035] Please refer to Figure 1 - Figure 8 The outer wall of the connecting block 604 fits with the inner wall of the connecting groove 605, the outer wall of the fixed block 607 fits with the inner wall of the fixed groove 606, and the fixed block 607 is located at one end of the outer wall of the connecting block 604 and is provided with a semicircular surface. The bottom end of the rotating ring 609 is provided with gear teeth, and the gear teeth are engaged with the first bevel gear 610. The second bevel gear 611 is engaged with the third bevel gear 612. The inner wall of the movable block 614 is provided with an internal thread, and the screw rod 613 matches the internal thread. The outer wall of the fixed block 607 is located below the movable block 614 and is fixedly connected to the limiting plate 10.

[0036] In this embodiment: rotate the rotating ring 609, the rotating ring 609 rotates to drive the first bevel gear 610 to rotate, the first bevel gear 610 rotates to drive the second bevel gear 611 to rotate, the second bevel gear 611 rotates to drive the third bevel gear 612 to rotate, the third bevel gear 612 rotates to drive the screw rod 613 to rotate, the screw rod 613 rotates to drive the movable block 614 to move, the movable block 614 moves and contacts with the fixed block 607, so that the fixed block 607 has no displacement space and cannot move out of the fixed groove 606, thereby reinforcing the air sleeve 3.

[0037] Please refer to Figure 5 - Figure 9 The inner wall of the mounting bracket 601 fits with the outer wall of the discharge furnace 1, the inner wall of the annular groove 701 fits with the outer wall of the slider 702, and a displacement groove for the movable plate 704 to slide is provided inside the mounting bracket 601. The push plate 707 extends to the inner wall of the displacement groove. A telescopic column is connected between the push plate 707 and the mounting bracket 601. The reset spring 708 is located on the outer wall of the telescopic column. There are several positioning grooves 710 that are equidistantly distributed on the circumference of the top of the rotating ring 609. The inner wall of the positioning groove 710 fits with the outer wall of the positioning block 709.

[0038] In this embodiment: the movable plate 704 moves downward and contacts the inclined surface, pushing the slider 702 to move, the slider 702 moves into the annular groove 701, thereby fixing the mounting frame 601, the movable plate 704 passes through the slider 702, and continues to move, the movable plate 704 moves and contacts the push plate 707, driving the push plate 707 to move, the push plate 707 moves and drives the positioning block 709 to move, the positioning block 709 moves into the positioning groove 710, thereby fixing the rotating ring 609, thereby reinforcing the wind sleeve 3.

[0039] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A waste heat recovery device for a petroleum coke calcining discharge furnace, comprising a discharge furnace (1), wherein the bottom end of the discharge furnace (1) is fixedly connected to a conical discharge port (2), an air sleeve (3) is provided below the conical discharge port (2), one end of the air sleeve (3) is connected to an air inlet (4), and the other end of the air sleeve (3) is connected to an air outlet (5), characterized in that: A heat conducting mechanism (6) is provided between the conical discharge port (2) and the air sleeve (3); The heat conduction mechanism (6) comprises a mounting frame (601), an aluminum shell (602), an aluminum plate (603), a connecting block (604), a connecting groove (605), a fixing groove (606), a fixing block (607), a fixing spring (608), a rotating ring (609), a first bevel gear (610), a second bevel gear (611), a third bevel gear (612), a screw rod (613) and a movable block (614); The mounting frame (601) is arranged between the conical discharge port (2) and the air sleeve (3), the aluminum shell (602) is fixedly connected to the bottom end of the mounting frame (601), the aluminum plate (603) is fixedly connected to the outer wall of the aluminum shell (602), the connecting block (604) is fixedly connected to the bottom end of the mounting frame (601) and is located on one side of the aluminum shell (602), the connecting groove (605) is opened at the top end of the air sleeve (3), and the fixing groove (606) is opened on the inner wall of the connecting groove (605); The fixed block (607) is slidably connected to the interior of the connecting block (604) and extends to the outer wall of the connecting block (604); the fixing spring (608) is connected between the connecting block (604) and the fixed block (607); the rotating ring (609) is rotatably connected to the outer wall of the mounting frame (601); the first bevel gear (610) is rotatably connected to the outer wall of the mounting frame (601) and is located at the bottom end of the rotating ring (609); the second bevel gear (611) is fixedly connected to one end of the first bevel gear (610) and is located inside the mounting frame (601); the third bevel gear (612) is rotatably connected to the interior of the mounting frame (601) and is located on the outer wall of the second bevel gear (611); the screw rod (613) is fixedly connected to one end of the third bevel gear (612); the movable block (614) is connected to the outer wall of the screw rod (613) and extends to the interior of the connecting block (604); A mounting mechanism (7) is provided between the mounting frame (601) and the discharge furnace (1).

2. A waste heat recovery device for a petroleum coke calcining furnace according to claim 1, characterized in that: The mounting mechanism (7) comprises an annular groove (701), a slider (702), a pushing block (703), a movable plate (704), a clamping block (705), a mounting spring (706), a pushing plate (707), a return spring (708), a positioning block (709) and a positioning groove (710); The annular groove (701) is opened on the outer wall of the discharge furnace (1), the slider (702) is slidably connected to the inside of the mounting frame (601) and extends to the inner wall of the mounting frame (601), the pushing block (703) is fixedly connected to the outer wall of the slider (702) and extends to the outer wall of the mounting frame (601), the movable plate (704) is slidably connected to the inside of the mounting frame (601) and extends to the top of the mounting frame (601), the clamping block (705) is slidably connected to the inside of the mounting frame (601) and extends to the top of the mounting frame (601). Located on one side of the movable plate (704), the mounting spring (706) is connected between the clamping block (705) and the mounting frame (601), the push plate (707) is slidably connected to the inside of the mounting frame (601) and is located above the rotating ring (609), the return spring (708) is connected between the push plate (707) and the mounting frame (601), the positioning block (709) is fixedly connected to the bottom end of the push plate (707), and the positioning groove (710) is opened at the top end of the rotating ring (609).

3. A waste heat recovery device for a petroleum coke calcining furnace according to claim 1, characterized in that: The inner wall of the aluminum shell (602) is in contact with the outer wall of the conical discharge port (2); a plurality of aluminum plates (603) are provided and are equidistantly distributed on the outer wall of the aluminum shell (602); a first sealing ring (8) is provided at the position where the top end of the air sleeve (3) and the mounting frame (601) meet; a second sealing ring (9) is provided at the position where the bottom end of the inner wall of the air sleeve (3) and the aluminum shell (602) meet.

4. The waste heat recovery device for a petroleum coke calcining furnace according to claim 1, characterized in that: The outer wall of the connecting block (604) fits in contact with the inner wall of the connecting groove (605), the outer wall of the fixing block (607) fits in contact with the inner wall of the fixing groove (606), and a semicircular surface is provided at one end of the fixing block (607) located on the outer wall of the connecting block (604).

5. The waste heat recovery device for a petroleum coke calcining furnace according to claim 1, characterized in that: The bottom end of the rotating ring (609) is provided with gear teeth, and the gear teeth are engaged with the first bevel gear (610), and the second bevel gear (611) is engaged with the third bevel gear (612).

6. A waste heat recovery device for a petroleum coke calcining furnace according to claim 1, characterized in that: The inner wall of the movable block (614) is provided with an internal thread, and the screw rod (613) matches the internal thread. The outer wall of the fixed block (607) is located below the movable block (614) and is fixedly connected to the limiting plate (10).

7. A waste heat recovery device for a petroleum coke calcining furnace according to claim 2, characterized in that: The inner wall of the mounting frame (601) is in contact with the outer wall of the discharge furnace (1), and the inner wall of the annular groove (701) is in contact with the outer wall of the sliding block (702).

8. The waste heat recovery device for a petroleum coke calcining furnace according to claim 2, characterized in that: A displacement groove for the movable plate (704) to slide is provided inside the mounting frame (601), and the push plate (707) extends to the inner wall of the displacement groove.

9. The waste heat recovery device for a petroleum coke calcining furnace according to claim 2, characterized in that: A telescopic column is connected between the push plate (707) and the mounting frame (601), and the return spring (708) is located on the outer wall of the telescopic column.

10. The waste heat recovery device for a petroleum coke calcining furnace according to claim 2, characterized in that: A plurality of positioning grooves (710) are provided and are equidistantly distributed on the top of the rotating ring (609), and the inner wall of the positioning groove (710) fits in contact with the outer wall of the positioning block (709).

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