Rotary cement kiln capable of improving energy utilization rate

Abstract

The utility model relates to the technical field of rotary kilns, in particular to a rotary cement kiln capable of improving energy utilization rate, which comprises a rotary kiln main body, a blanking mechanism is arranged on a kiln head cover of the rotary kiln main body, the blanking mechanism comprises a shell and a bevel gear II, a conveying mechanism is arranged on the back surface of the shell, and the bevel gear II is arranged on the shell. The conveying mechanism comprises a barrel and a second belt pulley, and the rear side of the top of the barrel communicates with a feeding hopper. The fan blades are driven to rotate through rotation of the connecting rod, then high-temperature smoke in the kiln tail smoke chamber on the rotary kiln body is conveyed into the box body through the first bent pipe, then the high-temperature smoke sequentially passes through the inner cavity of the cover body and the second bent pipe to flow back, and therefore the preheating device has the advantage that materials conveyed in the barrel body can be preheated. The high-temperature flue gas firstly transfers heat to the barrel body, and then the conveyed materials are heated through the barrel body, so that the high-temperature flue gas is reused, and the utilization rate of energy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary kilns, in particular to a cement rotary kiln capable of improving energy utilization. Background Art

[0002] A rotary kiln refers to a rotating calcining kiln, which belongs to the category of building materials equipment. Rotary kilns can be divided into cement kilns, metallurgical chemical kilns and lime kilns according to the materials they process. Cement kilns are mainly used to calcine cement clinker, and are divided into two categories: dry-process cement kilns and wet-process cement kilns.

[0003] After searching, the patent number is CN111721137B, and the name is an invention of a cement rotary kiln with heat utilization function, including a main body. Through research and analysis, it is found that although the rotary kiln has advantages in heat preservation, it still has the following disadvantages to a certain extent.

[0004] For example, the high-temperature flue gas in the tail smoke chamber of the rotary kiln cannot be utilized, and the materials cannot be preheated when entering the rotary kiln to improve the production efficiency. Moreover, when adding materials, the raw materials to be processed rely on their own gravity to enter the rotary kiln. This feeding method will cause a low filling rate inside the device, affect the working efficiency of the rotary kiln, and cause waste of production capacity inside the rotary kiln. In order to solve the above technical problems, we have designed a cement rotary kiln that improves energy utilization. Utility Model Content

[0005] The utility model aims to provide a cement rotary kiln with improved energy utilization, which has the advantages of utilizing high-temperature flue gas to preheat materials and having a high internal filling rate, and solves the problem that the high-temperature flue gas in the tail smoke chamber of the rotary kiln cannot be utilized and the materials cannot be preheated when entering the rotary kiln. The raw materials to be processed enter the rotary kiln by their own gravity. This feeding method will cause the problem of low internal filling rate of the device.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cement rotary kiln for improving energy utilization, comprising a rotary kiln main body, a kiln head cover of the rotary kiln main body is equipped with a feeding mechanism, the feeding mechanism comprises a shell and two bevel gears, a conveying mechanism is installed on the back of the shell, the conveying mechanism comprises a cylinder and two belt pulleys, the rear side of the top of the cylinder is connected to a feed hopper, a crushing mechanism is installed on the inner wall of the feed hopper, the crushing mechanism comprises a rotating rod, and a preheating mechanism is installed on the surface of the cylinder.

[0007] Preferably, the unloading mechanism includes a vertical rod, the bottom of the shell is fixedly connected to the top of the kiln head cover of the rotary kiln body, one end of the vertical rod is rotatably embedded in the top of the shell through a bearing, a scraper is welded on the surface of the vertical rod at one end of the inner cavity of the shell, and a bevel gear 1 is welded on the top of the vertical rod, and the bevel gear 1 is meshed with the bevel gear 2.

[0008] Preferably, the conveying mechanism includes a cross bar, the bottom of the front side of the cylinder is connected to the back side of the shell, one end of the cross bar is rotatably embedded in the back side of the cylinder through a bearing, a spiral blade is welded on the surface of the cross bar at one end of the inner cavity of the cylinder, a belt pulley 1 is welded on the rear end of the cross bar, and the surfaces of the belt pulley 1 and the belt pulley 2 are connected by belts for transmission.

[0009] Preferably, the crushing mechanism includes a crushing knife, and there are three rotating rods. Both ends of the three rotating rods are rotatably embedded in the inner wall of the feed hopper through bearings. The crushing knife sleeve is welded to the surface of the rotating rod. The surfaces of the front ends of the three rotating rods are sleeved with gears welded, and two adjacent gears are meshed with each other. The left side of the back side of the feed hopper is fixedly connected to a motor by bolts, and the rotating shaft of the motor is fixedly connected to the rear end of the rotating rod on the left, and the rear end of the middle rotating rod is welded to the front side of the belt pulley 2.

[0010] Preferably, the preheating mechanism includes a box body and a cover body, the cover body is welded on the surface of the cylinder and the feed hopper, the bottom of the back side of the box body is connected to the top of the front side of the cover body, the surface of the box body is rotatably embedded with a connecting rod through a bearing, the rear end of the connecting rod is welded to the front end of the middle rotating rod, the front end of the connecting rod is welded to the back side of the bevel gear 2, the surface of the front end of the connecting rod is sleeved with a fan blade, the top of the front side of the box body is connected to a bend pipe 1, the rear side of the bottom of the cover body is connected to a bend pipe 2, and the ends of the bend pipe 1 and the bend pipe 2 away from the cover body are both connected to the surface of the kiln tail smoke chamber of the rotary kiln body.

[0011] Preferably, a baffle frame is welded on the front side of the inner wall of the shell, and a feed opening is opened on the front side of the bottom of the shell.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] The utility model starts a motor to rotate a plurality of rotating rods, gears and crushing knives, and under the transmission action of the first belt pulley, the second belt pulley and the belt, the horizontal rod and the spiral blades are rotated, and under the rotation of the connecting rod driven by the rotating rod, the first bevel gear, the second bevel gear, the vertical rod and the scraper are rotated, thereby having the advantages of being able to crush, convey and smoothly discharge materials. The rotation of the crushing kiln crushes the materials, the rotation of the spiral blade conveys the crushed materials, and the rotation of the plurality of scrapers conveys the conveyed materials smoothly and intermittently into the rotary kiln body, thereby improving the filling efficiency inside the rotary kiln and reducing the situation of raw material returning.

[0014] The utility model drives the rotation of the fan blades through the rotation of the connecting rod, thereby transporting the high-temperature flue gas in the kiln tail smoke chamber on the rotary kiln main body into the box body through the curved pipe 1, and then refluxes through the inner cavity of the cover body and the curved pipe 2 in sequence, thereby having the advantage of being able to preheat the material transported in the cylinder. The high-temperature flue gas first transfers heat to the cylinder, and then heats the transported material through the cylinder, thereby reusing the high-temperature flue gas and improving the utilization rate of energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 This is a partial cutaway perspective view of the utility model. Figure 1 ;

[0017] Figure 3 A partial cutaway perspective view of the utility model Figure 2 ;

[0018] Figure 4 It is a cross-sectional perspective schematic diagram of the housing and the baffle frame of the utility model.

[0019] In the figure: 1. rotary kiln body; 2. unloading mechanism; 21. shell; 22. vertical rod; 23. scraper; 24. bevel gear 1; 25. bevel gear 2; 3. conveying mechanism; 31. cylinder; 32. cross bar; 33. spiral blade; 34. belt pulley 1; 35. belt pulley 2; 36. belt; 4. feed hopper; 5. crushing mechanism; 51. rotating rod; 52. crushing knife; 53. gear; 54. motor; 6. preheating mechanism; 61. cover; 62. box; 63. connecting rod; 64. fan blade; 65. elbow 1; 66. elbow 2; 7. baffle frame; 8. unloading port. DETAILED DESCRIPTION

[0020] See also Figure 1-Figure 4A cement rotary kiln for improving energy utilization includes a rotary kiln body 1, a kiln head cover of the rotary kiln body 1 is equipped with a feeding mechanism 2, the feeding mechanism 2 includes a shell 21 and a bevel gear 25, a conveying mechanism 3 is installed on the back of the shell 21, the conveying mechanism 3 includes a cylinder 31 and a belt pulley 35, the rear side of the top of the cylinder 31 is connected with a feeding hopper 4, the inner wall of the feeding hopper 4 is equipped with a crushing mechanism 5, the crushing mechanism 5 includes a rotating rod 51, and a preheating mechanism 6 is installed on the surface of the cylinder 31.

[0021] See also Figure 2 and Figure 3 The unloading mechanism 2 includes a vertical rod 22. By setting the vertical rod 22, a position is provided for the installation of multiple scrapers 23, and the scrapers 23 can be rotated at the same time. The bottom of the shell 21 is fixedly connected to the top of the kiln head cover of the rotary kiln body 1. One end of the vertical rod 22 is rotatably embedded in the top of the shell 21 through a bearing. A scraper 23 is welded on the surface of the vertical rod 22 located at one end of the inner cavity of the shell 21. By setting the scraper 23, the material transported into the shell 21 is intermittently unloaded into the rotary kiln body 1 under the rotation of the scraper 23. A bevel gear 24 is welded on the top of the vertical rod 22. The bevel gear 24 is meshed with the bevel gear 25. By setting the bevel gear 24 and the bevel gear 25, the transmission direction of the connecting rod 63 is changed, so that the connecting rod 63 can drive the vertical rod 22 to rotate.

[0022] See also Figure 2 and Figure 3 The conveying mechanism 3 includes a cross bar 32. The bottom of the front side of the cylinder 31 is connected to the back side of the shell 21. One end of the cross bar 32 is rotatably embedded in the back side of the cylinder 31 through a bearing. A spiral blade 33 is welded on the surface of the cross bar 32 at one end of the inner cavity of the cylinder 31. By setting the spiral blade 33, the crushed material is conveyed under the action of the cross bar 32 driving it to rotate. A belt pulley 1 34 is welded on the rear end of the cross bar 32. The surfaces of the belt pulley 1 34 and the belt pulley 2 35 are connected with a belt 36 for transmission. By setting the belt pulley 1 34, the belt pulley 2 35 and the belt 36, the cross bar 32 and the spiral blade 33 can also be rotated when a motor 54 drives the rotating rod 51 to rotate, thereby reducing the power consumption.

[0023] See also Figure 2 and Figure 3The crushing mechanism 5 includes a crushing knife 52. By setting the crushing knife 52, the material added to the feed hopper 4 is crushed to facilitate better heating during preheating. There are three rotating rods 51. Both ends of the three rotating rods 51 are rotatably embedded in the inner wall of the feed hopper 4 through bearings. The crushing knife 52 is sleeved and welded on the surface of the rotating rod 51. The surfaces of the front ends of the three rotating rods 51 are sleeved and welded with gears 53. Two adjacent gears 53 are meshed with each other. By setting the gears 53, the three rotating rods 51 can be rotated under the drive of a motor 54, thereby driving the multiple crushing knives 52 thereon to rotate. The left side of the back side of the feed hopper 4 is fixedly connected with a motor 54 by bolts. The rotating shaft of the motor 54 is fixedly connected to the rear end of the rotating rod 51 on the left side, and the rear end of the middle rotating rod 51 is welded to the front side of the belt pulley 2 35.

[0024] See also Figure 1 , Figure 2 and Figure 3 The preheating mechanism 6 includes a box body 62 and a cover body 61. By setting the cover body 61, the cylinder 31 is insulated and the smoke is prevented from leaking. The cover body 61 is welded on the surface of the cylinder 31 and the feed hopper 4. The bottom of the back of the box body 62 is connected to the top of the front of the cover body 61. The surface of the box body 62 is rotatably inlaid with a connecting rod 63 through a bearing. The rear end of the connecting rod 63 is welded to the front end of the middle rotating rod 51, and the front end of the connecting rod 63 is welded to the back of the bevel gear 25. The surface of the front end of the connecting rod 63 is welded. A fan blade 64 is connected. By setting the fan blade 64, a small amount of smoke in the kiln tail smoke chamber is sucked out under the action of the connecting rod 63 driving it to rotate, and it is transported to the cover body 61 to preheat the material transported in the cylinder 31. The top of the front side of the box body 62 is connected with a bend pipe 1 65, and the rear side of the bottom of the cover body 61 is connected with a bend pipe 2 66. By setting the bend pipe 2 66, it is convenient to reflux the sucked smoke. The ends of the bend pipe 1 65 and the bend pipe 2 66 away from the cover body 61 are both connected to the surface of the kiln tail smoke chamber of the rotary kiln main body 1.

[0025] See also Figure 3 and Figure 4 A baffle frame 7 is welded on the front side of the inner wall of the shell 21. By setting the baffle frame 7, the material is shielded, thereby effectively preventing the material from gathering on the front side of the inner cavity of the shell 21 and affecting the normal discharge. A discharge port 8 is opened on the front side of the bottom of the shell 21. By setting the discharge port 8, the material entering the shell 21 can be discharged normally under the action of the rotation of the scraper 23.

[0026] When in use, the motor 54 is started to rotate the multiple rotating rods 51, the gears 53 and the crushing blades 52, and the horizontal rod 32 and the spiral blade 33 are rotated under the transmission action of the belt pulley 1 34, the belt pulley 2 35 and the belt 36, and the bevel gear 1 24, the bevel gear 25, the vertical rod 22 and the scraper 23 are rotated under the rotation of the connecting rod 63 driven by the rotating rod 51. The rotation of the crushing blade 52 crushes the material, the rotation of the spiral blade 33 conveys the crushed material, and the rotation of the multiple scrapers 23 conveys the conveyed material smoothly and intermittently into the rotary kiln body 1. The rotation of the connecting rod 63 drives the rotation of the fan blade 64, and then the high-temperature flue gas in the kiln tail smoke chamber of the rotary kiln body 1 is conveyed to the box body 62 through the elbow pipe 1 65, and then refluxes through the inner cavity of the cover body 61 and the elbow pipe 2 66 in turn. The high-temperature flue gas first transfers heat to the cylinder body 31, and then heats the conveyed material through the cylinder body 31, so that the high-temperature flue gas is reused.

[0027] In summary: the cement rotary kiln with improved energy utilization rate, through the cooperation of the rotary kiln body 1, the unloading mechanism 2, the conveying mechanism 3, the feeding hopper 4, the crushing mechanism 5 and the preheating mechanism 6, solves the problem that the high-temperature flue gas in the tail smoke chamber of the rotary kiln cannot be utilized, the materials cannot be preheated when entering the rotary kiln, and the raw materials to be processed rely on their own gravity to enter the interior of the rotary kiln. This feeding method will cause the problem of low filling rate inside the device.

Claims

1. A cement rotary kiln for improving energy utilization, comprising a rotary kiln body (1), characterized in that: A material unloading mechanism (2) is installed on the kiln head cover of the rotary kiln body (1), the material unloading mechanism (2) comprising a shell (21) and a second bevel gear (25), a conveying mechanism (3) is installed on the back of the shell (21), the conveying mechanism (3) comprises a cylinder (31) and a second belt pulley (35), the rear side of the top of the cylinder (31) is connected to a feed hopper (4), a crushing mechanism (5) is installed on the inner wall of the feed hopper (4), the crushing mechanism (5) comprises a rotating rod (51), and a preheating mechanism (6) is installed on the surface of the cylinder (31).

2. A cement rotary kiln for improving energy utilization according to claim 1, characterized in that: The unloading mechanism (2) comprises a vertical rod (22), the bottom of the shell (21) is fixedly connected to the top of the kiln head cover of the rotary kiln body (1), one end of the vertical rod (22) is rotatably embedded in the top of the shell (21) through a bearing, a scraper (23) is welded to the surface of the vertical rod (22) at one end of the inner cavity of the shell (21), and a bevel gear 1 (24) is welded to the top of the vertical rod (22), and the bevel gear 1 (24) is meshed with a bevel gear 2 (25).

3. A cement rotary kiln for improving energy utilization according to claim 1, characterized in that: The conveying mechanism (3) comprises a cross bar (32), the bottom of the front side of the cylinder (31) is connected to the back side of the shell (21), one end of the cross bar (32) is rotatably embedded in the back side of the cylinder (31) through a bearing, a spiral blade (33) is welded to the surface of the cross bar (32) at one end of the inner cavity of the cylinder (31), a belt pulley 1 (34) is welded to the rear end of the cross bar (32), and a belt (36) is connected to the surface of the belt pulley 1 (34) and the belt pulley 2 (35) in a transmission manner.

4. A cement rotary kiln for improving energy utilization according to claim 1, characterized in that: The pulverizing mechanism (5) comprises a pulverizing blade (52). The number of the rotating rods (51) is three. Both ends of the three rotating rods (51) are rotatably embedded in the inner wall of the feed hopper (4) through bearings. The pulverizing blade (52) is sleeved and welded on the surface of the rotating rods (51). The surfaces of the front ends of the three rotating rods (51) are sleeved and welded with gears (53). Two adjacent gears (53) are meshed with each other. The left side of the back side of the feed hopper (4) is fixedly connected to a motor (54) by bolts. The rotating shaft of the motor (54) is fixedly connected to the rear end of the rotating rod (51) on the left side. The rear end of the middle rotating rod (51) is welded to the front side of the second belt pulley (35).

5. A cement rotary kiln for improving energy utilization according to claim 1, characterized in that: The preheating mechanism (6) comprises a box body (62) and a cover body (61). The cover body (61) is sleeved and welded on the surfaces of the cylinder (31) and the feed hopper (4). The bottom of the back side of the box body (62) is connected to the top of the front side of the cover body (61). A connecting rod (63) is rotatably embedded and connected to the surface of the box body (62) through a bearing. The rear end of the connecting rod (63) is welded to the front end of the middle rotating rod (51). The front end of the connecting rod (63) is welded to the back side of the second bevel gear (25). A fan blade (64) is sleeved and welded on the surface of the front end of the connecting rod (63). The top of the front side of the box body (62) is connected to a first curved pipe (65). The rear side of the bottom of the cover body (61) is connected to a second curved pipe (66). The ends of the first curved pipe (65) and the second curved pipe (66) away from the cover body (61) are both connected to the surface of the kiln tail smoke chamber of the rotary kiln body (1).

6. A cement rotary kiln for improving energy utilization according to claim 1, characterized in that: A baffle frame (7) is welded on the front side of the inner wall of the shell (21), and a material discharge opening (8) is provided on the front side of the bottom of the shell (21).

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