Waste heat recovery device for rotary cement kiln

Abstract

The utility model discloses a waste heat recovery device of a rotary cement kiln, and relates to the technical field of rotary cement kilns. The waste heat recovery device of the rotary cement kiln comprises a base, a rotary kiln structure is arranged at the top of the base, the outer side of the rotary kiln structure is sleeved with a splicing type waste heat recovery structure, and the splicing type waste heat recovery structure comprises two screw rods; according to the waste heat recovery device for the rotary cement kiln, a splicing type waste heat recovery structure is arranged, a rotary disc can drive a splicing semi-ring to be gradually attached to the surface of a rotary cylinder through a screw rod, and then splicing blocks and lap joint blocks can be rapidly combined through positioning pins in cooperation with inserting rods; according to the splicing type waste heat recovery structure, the heat absorption pipes in the splicing semi-rings can stably absorb heat generated when the rotary kiln works, the splicing semi-rings can be rapidly disassembled when the rotary kiln needs to be maintained, and normal maintenance of the rotary kiln structure cannot be affected by the existence of the splicing type waste heat recovery structure.

Description

Technical Field

[0001] The utility model relates to the technical field of cement rotary kilns, in particular to a cement rotary kiln waste heat recovery device. Background Art

[0002] Cement rotary kiln is mainly used to calcine cement clinker, which is divided into two categories: dry process cement kiln and wet process cement kiln. The rotary kiln is composed of gas flow, fuel combustion, heat transfer and material movement. The rotary kiln is how to make the fuel fully burn, the heat of fuel combustion can be effectively transferred to the material, and the material undergoes a series of physical and chemical changes after receiving the heat, and finally forms the finished clinker. Cement rotary kiln belongs to the category of building materials equipment and is a kind of lime kiln. According to the different materials processed, the rotary kiln can be divided into cement rotary kiln, metallurgical chemical rotary kiln and lime rotary kiln.

[0003] A large amount of waste heat will be generated during the operation of the rotary kiln. Direct discharge will cause a waste of resources. Therefore, it is necessary to recover the waste heat through a waste heat recovery device.

[0004] In a rotary kiln waste heat recovery mechanism with patent publication number CN219200043U, it is proposed that "the utility model discloses a rotary kiln waste heat recovery mechanism, including a base and a rotary kiln, the rotary kiln is arranged on the top of the base, and also includes a bracket, an arc cover, an exhaust fan, a tee, a drying pipe, a heat transfer pipe and a waste heat life use mechanism. The utility model improves the utilization rate of waste heat and realizes the diversification of waste heat utilization."

[0005] However, this solution still has some shortcomings in actual use. In the comparative solution, the heat generated by the rotary kiln during operation is sucked into the arc cover by an exhaust fan for heat exchange, but this method is a non-fitting heat exchange, which greatly reduces the heat exchange effect.

[0006] And according to the illustrations in the comparative scheme, when maintenance personnel need to perform routine maintenance on the rotary kiln, the presence of the arc hood will hinder the maintenance personnel's work progress, resulting in obstruction of the maintenance work of the rotary kiln. Utility Model Content

[0007] The utility model provides a cement rotary kiln waste heat recovery device to solve the problems in the background technology.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cement rotary kiln waste heat recovery device, comprising a base, a rotary kiln structure is arranged on the top of the base, a splicing type waste heat recovery structure is sleeved on the outer side of the rotary kiln structure, the splicing type waste heat recovery structure comprises two screws, one end of the screw is rotatably connected to the inner wall of the base, the other end of the screw extends to the outer side of the base and is fixedly connected to a turntable, a moving rod is threadedly connected to the surface of the screw, a splicing half ring is fixedly installed on the top of the moving rod, the two splicing half rings are fitted together, and a heat absorption pipe is inserted into the interior of the splicing half ring;

[0009] A splicing block and a lap block are fixedly mounted on the tops of the two splicing half rings respectively. A plug-in rod is arranged on the surface of the lap block. A positioning pin is arranged inside the splicing block through a damping spring and a lap plate. The positioning pin is movably connected with the plug-in rod through a groove.

[0010] Furthermore, the rotary kiln structure comprises two support rods, the top ends of the support rods are fixedly connected with support semi-rings, the notches of the support semi-rings are hinged with positioning semi-rings, and the inner sides of the support semi-rings and positioning semi-rings are provided with rotary drums.

[0011] Furthermore, the inner wall of the supporting half ring is rotatably connected to a rotating wheel, and the supporting half ring is overlapped with the outer side of the rotating drum through the rotating wheel.

[0012] Furthermore, the inner wall of the spliced ​​half ring is provided with a heat absorbing coating, and the heat absorbing coating is a heat transfer silicone grease coating layer.

[0013] Furthermore, the injection port of the heat absorption tube is located at the top of the spliced ​​half ring, and the discharge port of the heat absorption tube is located at the bottom of the spliced ​​half ring.

[0014] Compared with the prior art, the utility model provides a cement rotary kiln waste heat recovery device, which has the following beneficial effects:

[0015] The cement rotary kiln waste heat recovery device is provided with a spliced ​​waste heat recovery structure. The turntable can drive the spliced ​​half ring to gradually fit with the surface of the rotary drum through a screw rod, and the spliced ​​block and the overlap block can be quickly combined through a positioning pin in cooperation with the plug-in rod, so that the heat absorption pipe inside the spliced ​​half ring can stably absorb the heat generated when the rotary kiln is working, and when the rotary kiln needs to be maintained, the spliced ​​half ring can be quickly disassembled, so that the existence of the spliced ​​waste heat recovery structure will not affect the normal maintenance of the rotary kiln structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2This is a schematic diagram of the rotary kiln structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the spliced ​​waste heat recovery structure of the utility model;

[0019] Figure 4 It is a cross-sectional view of the spliced ​​waste heat recovery structure of the utility model;

[0020] Figure 5 It is a cross-sectional view of the splicing block structure of the utility model.

[0021] In the figure: 1. base; 2. rotary kiln structure; 3. splicing type waste heat recovery structure; 4. support rod; 5. support half ring; 6. positioning half ring; 7. rotary wheel; 8. rotary drum; 9. screw; 10. turntable; 11. moving rod; 12. splicing half ring; 13. heat absorbing coating; 14. heat absorbing pipe; 15. splicing block; 16. lap block; 17. plug-in rod; 18. lap plate; 19. positioning pin. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-5 The utility model discloses a waste heat recovery device for a cement rotary kiln, comprising a base 1, a rotary kiln structure 2 is arranged on the top of the base 1, and a spliced ​​waste heat recovery structure 3 is sleeved on the outer side of the rotary kiln structure 2; the rotary kiln structure 2 comprises two support rods 4, a support semi-ring 5 is fixedly connected to the top of the support rod 4, a positioning semi-ring 6 is hinged at the notch of the support semi-ring 5, a rotary drum 8 is arranged on the inner side of the support semi-ring 5 and the positioning semi-ring 6, a rotating wheel 7 is rotatably connected to the inner wall of the support semi-ring 5, and the support semi-ring 5 is mounted on the outer side of the rotary drum 8 through the rotating wheel 7. The spliced ​​waste heat recovery structure 3 includes two screws 9, one end of the screw 9 is rotatably connected to the inner wall of the base 1, and the other end of the screw 9 extends to the outside of the base 1 and is fixedly connected to a turntable 10. A moving rod 11 is threadedly connected to the surface of the screw 9, and a spliced ​​half ring 12 is fixedly installed on the top of the moving rod 11. The two spliced ​​half rings 12 are fitted together, and a heat absorption pipe 14 is inserted inside the spliced ​​half ring 12. The injection port of the heat absorption pipe 14 is located at the top of the spliced ​​half ring 12, and the discharge port of the heat absorption pipe 14 is located at the bottom of the spliced ​​half ring 12.

[0024] A splicing block 15 and a lap block 16 are fixedly installed on the top of the two splicing half rings 12, respectively. A plug-in rod 17 is provided on the surface of the lap block 16. A positioning pin 19 is provided inside the splicing block 15 through a damping spring and a lap plate 18. The lap plate 18 is fixedly connected to the inner wall of the splicing block 15. The positioning pin 19 penetrates the lap plate 18 and is slidably connected to the lap plate 18 through the damping spring. The positioning pin 19 is movably engaged with the plug-in rod 17 through a groove.

[0025] By setting up a spliced ​​waste heat recovery structure 3, the turntable 10 can drive the spliced ​​half ring 12 to gradually fit with the surface of the rotary drum 8 through the screw 9, and then the plug-in rod 17 can be used to quickly combine the spliced ​​block 15 and the overlap block 16 through the positioning pin 19, so that the heat absorption pipe 14 inside the spliced ​​half ring 12 can stably absorb the heat generated when the rotary kiln is working, and when the rotary kiln needs to be maintained, the spliced ​​half ring 12 can be quickly disassembled, so that the existence of the spliced ​​waste heat recovery structure 3 will not affect the normal maintenance of the rotary kiln structure 2.

[0026] Specifically, the inner wall of the splicing half ring 12 is provided with a heat absorbing coating 13, and the heat absorbing coating 13 is a heat transfer silicone grease coating layer.

[0027] In this embodiment, the heat absorbing coating 13 can enable the heat absorbing tube 14 to absorb heat quickly.

[0028] When the rotary kiln structure 2 is in use, a large amount of heat will be generated on the surface of the rotary drum 8. At this time, the turntable 10 is rotated to drive the screw 9 to rotate. Since the moving rod 11 is provided with a threaded hole adapted to the screw 9, the rotation of the screw 9 will drive the moving rod 11 to move in the axial direction, so that the movement of the moving rod 11 will drive the splicing half rings 12 to move synchronously, so that the two splicing half rings 12 will gradually fit the surface of the rotary drum 8.

[0029] In the process of the two splicing half rings 12 approaching each other, the plug rod 17 will gradually penetrate into the inner cavity of the splicing block 15, and the automatic resilience of the damping spring can make the arc-shaped bottom end of the positioning pin 19 slide along the top of the plug rod 17 in advance, and finally insert into the groove of the plug rod 17, thereby completing the fit between the splicing block 15 and the overlap block 16, and then promoting the mutual splicing between the two splicing half rings 12;

[0030] At this time, water is introduced into the heat absorbing tube 14, and the surface heat of the rotary drum 8 is used to heat the water, so that the water is heated and then discharged.

[0031] When the rotary drum 8 needs to be maintained, it is only necessary to release the connection between the splicing block 15 and the overlapping block 16 and move the two splicing half rings 12 away from each other.

[0032] To sum up, the cement rotary kiln waste heat recovery device, by setting up a splicing type waste heat recovery structure 3, uses the turntable 10 to drive the splicing half ring 12 to gradually fit with the surface of the rotary drum 8 through the screw 9, and then cooperates with the plug-in rod 17 to quickly combine the splicing block 15 and the overlap block 16 through the positioning pin 19, so that the heat absorption pipe 14 inside the splicing half ring 12 can stably absorb the heat generated when the rotary kiln is working, and when the rotary kiln needs to be maintained, the splicing half ring 12 can be quickly disassembled, so that the existence of the splicing type waste heat recovery structure 3 will not affect the normal maintenance of the rotary kiln structure 2.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery device for a cement rotary kiln, comprising a base (1), characterized in that: A rotary kiln structure (2) is arranged on the top of the base (1), and a spliced ​​waste heat recovery structure (3) is sleeved on the outer side of the rotary kiln structure (2). The spliced ​​waste heat recovery structure (3) comprises two screws (9), one end of the screws (9) is rotatably connected to the inner wall of the base (1), the other end of the screws (9) extends to the outer side of the base (1) and is fixedly connected to a turntable (10), a moving rod (11) is threadedly connected to the surface of the screws (9), a spliced ​​half ring (12) is fixedly installed on the top of the moving rod (11), the two spliced ​​half rings (12) are fitted together, and a heat absorption pipe (14) is inserted into the interior of the spliced ​​half ring (12); A splicing block (15) and a lap block (16) are respectively fixedly mounted on the top ends of the two splicing half rings (12); a plug-in rod (17) is provided on the surface of the lap block (16); a positioning pin (19) is provided inside the splicing block (15) via a damping spring and a lap plate (18); the positioning pin (19) is movably engaged with the plug-in rod (17) via a groove.

2. The waste heat recovery device for a cement rotary kiln according to claim 1, characterized in that: The rotary kiln structure (2) comprises two support rods (4), the top ends of the support rods (4) being fixedly connected to support semi-rings (5), the notches of the support semi-rings (5) being hinged to positioning semi-rings (6), and the inner sides of the support semi-rings (5) and the positioning semi-rings (6) being provided with rotary drums (8).

3. The waste heat recovery device for a cement rotary kiln according to claim 2, characterized in that: The inner wall of the supporting half ring (5) is rotatably connected to a rotating wheel (7), and the supporting half ring (5) is overlapped with the outer side of the rotating drum (8) via the rotating wheel (7).

4. The waste heat recovery device for cement rotary kiln according to claim 1, characterized in that: The inner wall of the spliced ​​half ring (12) is provided with a heat absorbing coating (13), and the heat absorbing coating (13) is a heat transfer silicone grease coating layer.

5. The waste heat recovery device for cement rotary kiln according to claim 1, characterized in that: The injection port of the heat absorption pipe (14) is located at the top of the spliced ​​half ring (12), and the discharge port of the heat absorption pipe (14) is located at the bottom of the spliced ​​half ring (12).

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