A rotary kiln for calcining cement clinker

Abstract

The present invention relates to the technical field of cement calcining rotary kilns, and specifically proposes a rotary kiln for calcining cement clinker, comprising a kiln body cylinder, wherein the end of the high end of the kiln body cylinder is connected to a feeding hopper through a separation adjustment mechanism. When calcining cement clinker, the present invention performs on-off adjustment of corresponding feed pipes and branch pipes according to demand through the adjustment drive group in the separation adjustment mechanism in coordination with a plurality of on-off connection groups, so that when raw material powder enters the feed pipe connected to the branch pipe, the feed pipe is in a full pipe state, thereby avoiding the problem that smoke enters the feed pipe that is conveying raw material powder from the main pipe and branch pipe connected to the kiln body cylinder, resulting in the problem that smoke blows the raw material powder and the waste heat of smoke cannot be well utilized.

Description

Technical Field

[0001] The invention relates to the technical field of cement calcining rotary kilns, and specifically provides a rotary kiln for calcining cement clinker. Background Art

[0002] Cement clinker is one of the key raw materials for cement production. It is a semi-finished product formed by calcining raw materials such as limestone and clay at high temperatures. The rotary kiln is a key equipment for calcining cement clinker, which converts raw material powder such as limestone and clay into cement clinker through high-temperature calcination.

[0003] The existing rotary kiln includes a feeding hopper, a kiln body, a supporting wheel group, a gear group, a cooling cylinder, a blower, a coal injection pipe and a coal powder bin (such as Figure 3 As shown in the figure, raw material powder is fed into the kiln body from the feeding hopper. The inclined kiln body slowly rotates to make the material tumble in the circumferential direction and move axially from the high end to the low end of the kiln body. The burner ignites the fuel powder sprayed from the coal injection pipe, thereby decomposing and burning the material tumbling in the kiln body. After being burned into cement clinker, it is discharged from the lower end of the kiln body and enters the cooler.

[0004] However, the existing rotary kiln still has the following defects: first, the raw material powder inlet and the smoke outlet are the same, and the smoke exhaust direction is opposite to the raw material powder feeding direction. At the raw material powder feeding port, the smoke will blow the raw material powder out or the smoke will be blocked by a large amount of raw material powder and cannot be discharged; second, the diameter of the feed pipeline for feeding raw material powder is fixed, but the feed amount may need to be adjusted according to production needs, resulting in a situation where the raw material powder is not fully transported in the pipeline, and then the smoke blows the raw material powder during the transportation process and the waste heat of the smoke cannot be well utilized. Summary of the invention

[0005] In view of the above problems, an embodiment of the present application provides a rotary kiln for calcining cement clinker to solve the technical problems in the related art.

[0006] In order to achieve the above-mentioned purpose, the embodiment of the present application provides the following technical solution: a rotary kiln for calcining cement clinker, comprising a kiln body cylinder, the kiln body cylinder is inclined, a burner is arranged on the inner wall of the lower end of the kiln body cylinder, and the end of the high end of the kiln body cylinder is connected to the feeding hopper through a separation and adjustment mechanism.

[0007] A supporting wheel group is arranged at the lower end of the kiln body cylinder for supporting it, and a gear group is arranged in the middle part for driving it to rotate. One end of the kiln body cylinder connected to the separation and adjustment mechanism is the kiln tail, and the other end is the kiln head. A cooling cylinder is arranged at the kiln head, and a base is arranged below the kiln head. A cement outlet is opened on the base, and a blower and a bracket are also installed on the base. The air outlet of the blower is connected to a coal injection pipe extending into the kiln body cylinder, and a coal powder bin for conveying coal powder to the coal injection pipe is installed on the bracket.

[0008] The separation and adjustment mechanism includes a rectangular cylinder, in which a plurality of partitions evenly arranged along the length direction are installed, the partitions divide the inner wall of the rectangular cylinder into a plurality of smoke chamber channels, a feed pipe is installed in the smoke chamber channel, smoke gathering boxes are installed at both ends of the rectangular cylinder, the smoke gathering boxes are hollow rectangular structures, both ends of the feed pipe are respectively inserted into the smoke gathering boxes on both sides thereof, the side wall of the smoke gathering box close to the rectangular cylinder is provided with air holes arranged along the length direction of the smoke gathering box and connected one by one with the corresponding smoke chamber channels, and a branch discharge pipe group is installed on the side wall of the smoke gathering box away from the rectangular cylinder.

[0009] The two branch discharge pipe groups are composed of a funnel-shaped main pipe with a small diameter end facing the smoke gathering box, and branch pipes arranged in sequence along its radial direction are installed on the small diameter end of the main pipe. One of the main pipes is rotatably connected to the kiln body, and the other main pipe is connected to the feeding hopper. The branch pipes correspond to the material conveying pipes one by one, and the branch pipes are concentrically aligned with the corresponding material conveying pipes after passing through the smoke gathering box.

[0010] An on-off connection group is installed between the two smoke gathering boxes. The on-off connection group controls the connection and disconnection of the corresponding branch pipes at both ends of the conveying pipeline and the closing and opening of the corresponding air holes. The outer wall of the rectangular cylinder is installed with an adjustment drive group that drives multiple on-off connection groups; a smoke inlet pipe is installed between the small-diameter end of the main pipe connected to the kiln body cylinder and the adjacent smoke gathering box.

[0011] In a possible implementation, the material conveying pipeline is located in the middle of the smoke chamber channel; and a guide arc plate is installed on the inner wall of the main pipe connected to the kiln body.

[0012] In one possible implementation, the on-off connection group includes a rectangular tube that connects and communicates the branch pipe with the material delivery pipeline, a movable plate is slidably connected to the middle of one of the side walls of the rectangular tube, and a supplementary closing component that cooperates with the movable plate is installed on the inner wall of the rectangular tube away from the movable plate. One end of the movable plate penetrates through one of the side walls arranged in the width direction of the smoke gathering box and is connected to the outer wall of the smoke gathering box through a tension spring, and a sealing component for sealing the air holes corresponding to the movable plate is arranged between the movable plate and the corresponding smoke gathering box. When the movable plate and the supplementary closing component are plugged in to disconnect the branch pipe from the material delivery pipeline, the movable plate drives the sealing component to close the air holes, and the two upper and lower corresponding movable plates that penetrate through one end of the smoke gathering box are jointly installed with a connecting frame, and a top rod is installed in the middle of the connecting frame.

[0013] In a possible implementation, the supplementary closing component is a triangular bar connected to the inner wall of the rectangular tube.

[0014] In one possible implementation, the sealing assembly includes an ear plate installed on the inner wall of the smoke gathering box, the ear plate is connected to a push rod that slides up and down, one end of the push rod is installed with a conical sealing plug aligned with the corresponding air hole, the side wall of the movable plate is installed with a movable guide bar, the inner wall of the smoke gathering box is provided with a storage groove for accommodating the movable guide bar, the end surface of the movable guide bar close to the corresponding air hole is provided with a track groove, one end of the push rod away from the ear plate is slidably connected to the track groove, and the other end of the push rod is slidably connected to the track groove through a rotatably connected roller, and the track groove consists of an inclined section and a horizontal section.

[0015] In one possible implementation, the adjustment drive group includes a push head arranged along the length direction of a rectangular cylinder installed on one side outer wall arranged along the width direction, the push heads correspond to the push rods one by one, and the multiple push heads are arranged in a stepped manner. The push heads are wedge-shaped structures with the inclined surfaces facing downward and close to the corresponding push rods. The multiple push heads are connected by a connecting plate, and a lifting drive assembly is installed on the connecting plate to drive them to move.

[0016] In one possible implementation, the movable plate is provided with two limit assemblies arranged along its length direction, and the limit assemblies are circular frame bars mounted on the movable plate, one of the circular frame bars is located inside the smoke collection box, and the other circular frame bar is located outside the smoke collection box, and sealing gaskets are installed on the opposite surfaces of the two circular frame bars.

[0017] The above one or more technical solutions in the embodiments of the present invention have at least one of the following beneficial effects: 1. When calcining cement clinker, the present invention performs on-off adjustment of the corresponding feed pipeline and branch pipe according to demand through the adjustment drive group in the separation adjustment mechanism in coordination with multiple on-off connection groups, so that when the raw material powder enters the feed pipeline connected to the branch pipe, the feed pipeline is in a full pipe state, thereby avoiding the problem that the flue gas enters the feed pipeline that is conveying raw material powder from the main pipe and branch pipe connected to the kiln body, causing the flue gas to blow the raw material powder and the waste heat of the flue gas cannot be well utilized.

[0018] 2. The present invention separates the exhaust of smoke from the entry of raw material through a separation and adjustment mechanism, so that the separated smoke enters the smoke chamber channel and covers the feed pipeline, and the raw material powder in the feed pipeline is preheated by the residual heat in the smoke, so that the residual heat in the smoke can be fully utilized. At the same time, the smoke and the raw material powder can be separated, avoiding the mutual entry and exit and mutual influence of the two, thus achieving the effect of one machine with two uses.

[0019] 3. The two circular frame bars designed in the present invention can not only be used to limit the moving distance of the movable plate, but also can seal the sliding connection between the movable plate and the smoke collection box through the sealing gasket on the circular frame bar, so as to prevent smoke leakage and dispersion, which is beneficial to further improve the utilization rate of the waste heat of the smoke. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0021] Figure 1 It is a first three-dimensional structural schematic diagram of the separation and adjustment mechanism of the present invention.

[0022] Figure 2 It is a second three-dimensional structural schematic diagram of the separation and adjustment mechanism of the present invention.

[0023] Figure 3 It is a schematic diagram of the overall structure of an existing rotary kiln.

[0024] Figure 4 It is a top sectional view of a rectangular cylinder of the present invention.

[0025] Figure 5 The present invention Figure 1 Main sectional view.

[0026] Figure 6 The present invention Figure 5Enlarged view of point A in .

[0027] Figure 7 It is a schematic structural diagram of the plugging assembly of the present invention.

[0028] Figure 8 It is a structural schematic diagram of the storage groove and the movable guide bar of the present invention.

[0029] Figure numerals: 1, kiln body; 2, burner; 3, separation and adjustment mechanism; 30, rectangular cylinder; 31, partition; 32, smoke chamber channel; 33, feed pipe; 34, smoke gathering box; 35, air hole; 350, ear plate; 351, stopper; 352, conical sealing plug; 353, moving guide bar; 354, track groove; 36, branch discharge pipeline group; 360, main pipe; 361, branch pipe; 37, on-off connection group; 370, rectangular cylinder shaped tube; 371, movable plate; 372, supplementary closing assembly; 373, retracting spring; 374, connecting frame; 375, push rod; 38, adjusting drive group; 380, push head; 381, connecting plate; 39, smoke inlet pipe; 390, circular frame bar; 391, guide arc plate; 4, feeding hopper; 5, supporting wheel group; 6, gear group; 7, cooling cylinder; 8, base; 9, cement outlet; 10, blower; 11, coal injection pipe; 12, coal powder bin. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0031] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] See also Figure 2 and Figure 3 A rotary kiln for calcining cement clinker comprises a kiln body 1, which is inclined. A burner 2 is arranged on the inner wall of the lower end of the kiln body 1, and the upper end of the kiln body 1 is connected to a feeding hopper 4 through a separation adjustment mechanism 3.

[0033] See also Figure 3The lower end of the kiln body cylinder 1 is provided with a supporting wheel group 5 for supporting it, and the middle part is provided with a gear group 6 for driving it to rotate. The end of the kiln body cylinder 1 connected to the separation and adjustment mechanism 3 is the kiln tail, and the other end is the kiln head. The kiln head is provided with a cooling cylinder 7, and a base 8 is provided below the kiln head. A cement outlet 9 is opened on the base 8. A blower 10 and a bracket are also installed on the base 8. The air outlet of the blower 10 is connected to a coal injection pipe 11 extending into the kiln body cylinder 1, and a coal powder bin 12 for conveying coal powder to the coal injection pipe 11 is installed on the bracket.

[0034] The raw meal powder is fed into the separation and adjustment mechanism 3 from the feeding hopper 4 connected to the high end of the kiln tail cylinder. After passing through the separation and adjustment mechanism 3, the raw meal powder enters the kiln body cylinder 1. Since the kiln body cylinder 1 is tilted and slowly rotated, the material rolls in the circumferential direction and moves axially from the high end to the low end of the kiln body cylinder 1. The burner 2 ignites the fuel powder sprayed from the coal injection pipe 11, thereby decomposing and burning the material rolling in the kiln body cylinder 1. After being burned into cement clinker, it is discharged from the low end of the kiln body cylinder 1 and enters the cooler.

[0035] See also Figure 1 , Figure 2 , Figure 4 and Figure 5 The separation and adjustment mechanism 3 includes a rectangular cylinder 30, in which a plurality of partitions 31 evenly arranged along the length direction are installed. The partitions 31 divide the inner wall of the rectangular cylinder 30 into a plurality of smoke chamber channels 32. A feed pipe 33 is installed in the smoke chamber channel 32. Smoke gathering boxes 34 are installed at both ends of the rectangular cylinder 30. The smoke gathering boxes 34 are hollow rectangular structures. Both ends of the feed pipe 33 are respectively inserted into the smoke gathering boxes 34 on both sides thereof. The side wall of the smoke gathering box 34 close to the rectangular cylinder 30 is provided with air holes 35 arranged along the length direction of the smoke gathering box 34 and connected one by one with the corresponding smoke chamber channels 32. A branch discharge pipe group 36 is installed on the side wall of the smoke gathering box 34 away from the rectangular cylinder 30.

[0036] See also Figure 4 The feed pipe 33 is located in the middle of the smoke chamber channel 32. When the smoke enters the smoke chamber channel 32, it can fully cover the outer wall of the feed pipe 33, and the residual heat energy in the smoke can be fully utilized.

[0037] See also Figure 2 , Figure 4 and Figure 5The two branch discharge pipe groups 36 are composed of a funnel-shaped main pipe 360 ​​with a small diameter end facing the smoke gathering box 34, and a main pipe 360 ​​with a small diameter end equipped with branch pipes 361 arranged in sequence along its radial direction. One of the main pipes 360 is rotatably connected to the kiln body 1, and the other main pipe 360 ​​is connected to the feeding hopper 4. The branch pipes 361 correspond to the feed pipes 33 one by one, and the branch pipes 361 are concentrically aligned with the corresponding feed pipes 33 after passing through the smoke gathering box 34.

[0038] See also Figure 2 and Figure 5 An on-off connection group 37 is installed between the two smoke gathering boxes 34. The on-off connection group 37 controls the connection and disconnection of the corresponding branch pipes 361 at both ends of the conveying pipeline 33 and the closing and opening of the corresponding air holes 35. The outer wall of the rectangular cylinder 30 is installed with an adjustment drive group 38 that drives multiple on-off connection groups 37.

[0039] See also Figure 5 A smoke inlet pipe 39 is installed between the small-diameter end of the main pipe 360 ​​connected to the kiln body 1 and the adjacent smoke gathering box 34.

[0040] When the feed amount is adjusted according to production needs, the corresponding feed pipeline 33 and branch pipe 361 are adjusted by adjusting the drive group 38 and coordinating with the multiple on-off connection groups 37, so that when the raw material powder enters the feed pipeline 33 connected to the branch pipe 361, the feed pipeline 33 is in a full pipe state, thereby preventing the smoke from entering the feed pipeline 33 that is conveying raw material powder from the main pipe 360 ​​and the branch pipe 361 connected to the kiln body 1, resulting in the smoke blowing the raw material powder and the waste heat of the smoke cannot be well utilized.

[0041] During production, the raw material powder is fed from the feeding hopper 4 connected to the high end of the kiln tail cylinder into the main pipe 360 ​​and the branch pipe 361 connected to the feeding hopper 4, and then the raw material powder enters the feed pipe 33 connected to the current branch pipe 361 through the branch pipe 361 connected to the feeding hopper 4. Since the feed pipe 33 is in a full pipe state, the smoke generated by calcining the raw material powder in the kiln body cylinder 1 enters the smoke gathering box 34 connected to it from the smoke inlet pipe 39, and then enters the smoke chamber channel 32 through the corresponding opened air holes 35. After entering the smoke chamber channel 32, the smoke covers the feed pipe 33 and preheats the raw material powder in the feed pipe 33 through the waste heat in the smoke, so that the waste heat in the smoke can be fully utilized. At the same time, the smoke and the raw material powder can be separated to avoid the mutual influence of the two entering and exiting each other, thus achieving the effect of one machine with two uses.

[0042] See also Figure 5A guide arc plate 391 is installed on the inner wall of the main pipe 360 ​​connected to the kiln body 1. The guide arc plate 391 is used to separate the pipe opening of the smoke inlet pipe 39 from the corresponding pipe opening of the branch pipe 361, so as to prevent the raw material powder heated by the waste heat of the flue gas from entering the main pipe 360 ​​and the kiln body 1 from the branch pipe 361. The distance between the pipe opening of the smoke inlet pipe 39 and the corresponding pipe opening of the branch pipe 361 is too close, and the flue gas blows the raw material powder into the smoke inlet pipe 39.

[0043] See also Figure 2 , Figure 5 and Figure 6 The on-off connection group 37 includes a rectangular tube 370 that connects and communicates the branch pipe 361 with the feed pipe 33. A moving plate 371 is slidably connected to the middle of one of the side walls of the rectangular tube 370. A supplementary closing component 372 that is plugged into and matched with the moving plate 371 is installed on the inner wall of the rectangular tube 370 away from the moving plate 371. One end of the moving plate 371 passes through one of the side walls arranged in the width direction of the smoke gathering box 34 and is connected to the outer wall of the smoke gathering box 34 through a tension spring 37. 3, a blocking component for blocking the air hole 35 corresponding to the moving plate 371 is arranged between the moving plate 371 and the corresponding smoke gathering box 34, when the moving plate 371 and the supplementary closing component 372 are plugged and matched to disconnect the branch pipe 361 from the feeding pipeline 33, the moving plate 371 drives the blocking component to close the air hole 35, and the two upper and lower corresponding moving plates 371 passing through one end of the smoke gathering box 34 are jointly installed with a connecting frame 374, and a push rod 375 is installed in the middle of the connecting frame 374.

[0044] When the feed amount needs to be adjusted according to production needs and the corresponding feed pipeline 33 needs to be opened, the adjustment drive group 38 pushes a number of push rods 375 in turn as needed, and the push rods 375 drive the two movable plates 371 connected to it to move through the connecting frame 374, and the connecting frame 374 moves in the direction away from the rectangular cylinder 30. During the movement, the movable plate 371 pulls the retracting spring 373 to stretch, and at the same time, the movable plate 371 moves to open the middle part of the rectangular tube 370, so that the branch pipe 361 and the rectangular tube 370 are connected to the corresponding feed pipeline 33, so that when the raw material powder enters the feed pipeline 33 connected to the branch pipe 361, the feed pipeline 33 is in a full pipe state, thereby avoiding the smoke from the main pipe 360 ​​and the branch pipe 361 connected to the kiln body cylinder 1 Entering the feed pipeline 33 that is conveying raw material powder, causing the smoke to blow the raw material powder and the waste heat of the smoke cannot be well utilized.

[0045] See also Figure 6The supplementary closing component 372 is a triangular bar connected to the inner wall of the rectangular tube 370. A triangular groove matching the triangular bar is provided at one end of the movable plate 371 close to the triangular bar. The triangular bar is used to shorten the moving distance of the movable plate 371, thereby improving the convenience of driving the movable plate 371. The inclined surface of the triangular bar is also used to avoid the accumulation of raw material powder.

[0046] See also Figure 2 , Figure 6 , Figure 7 and Figure 8 The sealing component includes an ear plate 350 installed on the inner wall of the smoke gathering box 34, and a push rod 351 that slides up and down is connected to the ear plate 350. A conical sealing plug 352 aligned with the corresponding air hole 35 is installed at one end of the push rod 351. A movable guide bar 353 is installed on the side wall of the movable plate 371. A storage groove for accommodating the movable guide bar 353 is provided on the inner wall of the smoke gathering box 34. A track groove 354 is provided on the end surface of the movable guide bar 353 close to the corresponding air hole 35. The other end of the push rod 351 is slidably connected in the track groove 354 through a rotatably connected roller. The track groove 354 consists of an inclined section and a horizontal section.

[0047] During the movement, the movable plate 371 drives the movable guide bar 353 to move synchronously. In the process of the movable plate 371 moving to disconnect the feed pipe 33 connected to the rectangular tube 370 from the branch pipe 361, the inclined section of the track groove 354 is used to push the push rod 351 to drive the conical sealing plug 352 to move toward the air hole 35 until the conical sealing plug 352 blocks the corresponding air hole 35, thereby allowing the flue gas to enter the flue gas channel where the feed pipe 33 connected to the branch pipe 361 is located, further improving the utilization rate of the waste heat of the flue gas. After the push rod 351 is separated from the inclined section of the track groove 354, it cooperates with the horizontal section of the track groove 354, and the push rod 351 no longer moves.

[0048] When the movable plate 371 moves away from the middle of the corresponding rectangular tube 370, the roller on the support rod 351 rotates along the track groove 354 as the movable guide bar 353 moves, and at the same time moves upward along the guidance of the inclined section of the track groove 354, thereby opening the corresponding air hole 35.

[0049] See also Figure 1 and Figure 2 The adjustment drive group 38 includes a push head 380 arranged along the length direction of the rectangular cylinder 30 and installed on one side outer wall thereof arranged along the width direction. The push heads 380 correspond to the push rods 375 one by one. The multiple push heads 380 are arranged in a stepped manner. The push heads 380 are wedge-shaped structures with the inclined surfaces facing downward and close to the corresponding push rods 375. The multiple push heads 380 are connected by a connecting plate 381, and a lifting drive component (such as an electric slider) is installed on the connecting plate 381 to drive them to move.

[0050] The lifting drive assembly drives the plurality of push heads 380 to move downward through the connecting plate 381. Whenever the inclined surface of a push head 380 contacts the corresponding push rod 375, the corresponding moving plate 371 is driven to move, thereby opening the corresponding rectangular tube 370. When the plurality of push heads 380 are arranged in a stepped manner, the plurality of moving plates 371 do not move at the same time.

[0051] See also Figure 6 The movable plate 371 is provided with two limit assemblies arranged along its length direction. The limit assemblies are circular frame bars 390 sleeved on the movable plate 371. One circular frame bar 390 is located inside the smoke gathering box 34, and the other circular frame bar 390 is located outside the smoke gathering box 34. Sealing gaskets (not shown in the figure) are installed on the opposite surfaces of the two circular frame bars 390.

[0052] The circular frame strip 390 located in the smoke gathering box 34 is used to limit the moving distance of the movable plate 371 to prevent the end of the movable plate 371 from moving directly out of the rectangular tube 370 when moving from the inside of the rectangular tube 370 to the outside. At the same time, the sealing gasket on the circular frame strip 390 is made of high temperature resistant material. When the movable plate 371 separates the rectangular tube 370, the sealing gasket on the circular frame strip 390 located on the outside of the smoke gathering box 34 is pressed against the outer wall of the smoke gathering box 34; when the movable plate 371 moves to fully open the rectangular tube 370, the sealing gasket on the circular frame strip 390 located on the inside of the smoke gathering box 34 is pressed against the inner wall of the smoke gathering box 34, thereby sealing the sliding connection between the movable plate 371 and the smoke gathering box 34 to prevent smoke from leaking and dispersing everywhere.

[0053] During operation, the raw material powder is fed from the feeding hopper 4 connected to the high end of the kiln tail cylinder into the main pipe 360 ​​and the branch pipe 361 connected to the feeding hopper 4, and then the raw material powder enters the feed pipe 33 connected to the branch pipe 361 through the branch pipe 361 connected to the feeding hopper 4. Since the feed pipe 33 for conveying the raw material powder is currently in a full pipe state, the flue gas generated by calcining the raw material powder in the kiln body cylinder 1 at this time enters the flue gas gathering box 34 connected to it from the smoke inlet pipe 39, and then enters the smoke chamber channel 32 through the corresponding opened air holes 35. After entering the smoke chamber channel 32, the smoke covers the feed pipe 33, and uses the waste heat in the smoke to preheat the raw material powder in the feed pipe 33, so that the waste heat in the smoke can be fully utilized.

[0054] After that, the raw material powder passes through the separation and adjustment mechanism 3 and enters the kiln body 1. As the kiln body 1 tilts and slowly rotates, the material rolls in the circumferential direction and moves axially from the high end to the low end of the kiln body 1. The burner 2 ignites the fuel powder sprayed from the coal injection pipe 11, thereby decomposing and burning the material rolling in the kiln body 1. After being burned into cement clinker, it is discharged from the lower end of the kiln body 1 and enters the cooler.

[0055] In the description of the present invention, it is necessary to understand that the terms "length", "width", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0056] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotary kiln for calcining cement clinker, comprising a kiln body (1), the kiln body (1) is inclined, and a burner (2) is arranged on the inner wall of the lower end of the kiln body (1), characterized in that: The high end of the kiln body cylinder (1) is connected to the feeding hopper (4) through a separation adjustment mechanism (3); The separation and adjustment mechanism (3) comprises a rectangular cylinder (30), wherein a plurality of partitions (31) are evenly arranged along the length direction of the rectangular cylinder (30), wherein the partitions (31) divide the inner wall of the rectangular cylinder (30) into a plurality of smoke chamber channels (32), wherein a feed pipe (33) is installed in the smoke chamber channel (32), and smoke gathering boxes (34) are installed at both ends of the rectangular cylinder (30), wherein the smoke gathering box (34) is a hollow rectangular structure, wherein both ends of the feed pipe (33) respectively penetrate into the smoke gathering boxes (34) on both sides thereof, and a side wall of the smoke gathering box (34) close to the rectangular cylinder (30) is provided with air holes (35) arranged along the length direction of the smoke gathering box (34) and connected one by one with the corresponding smoke chamber channels (32), and a side wall of the smoke gathering box (34) away from the rectangular cylinder (30) is provided with a branch discharge pipe group (36); The two branch discharge pipe groups (36) are each composed of a funnel-shaped main pipe (360) with a small diameter end facing the smoke gathering box (34), and branch pipes (361) arranged in sequence along the radial direction of the main pipe (360) installed at the small diameter end thereof, one of the main pipes (360) being rotatably connected to the kiln body (1), and the other main pipe (360) being connected to the feeding hopper (4), the branch pipes (361) corresponding to the material conveying pipes (33) one by one, and the branch pipes (361) being concentrically aligned with the corresponding material conveying pipes (33) after passing through the smoke gathering box (34); An on-off connection group (37) is installed between the two smoke gathering boxes (34), and the on-off connection group (37) controls the connection and disconnection of the branch pipes (361) corresponding to the two ends of the material conveying pipeline (33) and the closing and opening of the corresponding air holes (35). The outer wall of the rectangular cylinder (30) is installed with an adjustment drive group (38) for driving the multiple on-off connection groups (37); a smoke inlet pipe (39) is installed between the small-diameter end of the main pipe (360) connected to the kiln body cylinder (1) and the adjacent smoke gathering box (34); The on-off connection group (37) comprises a rectangular tube (370) which connects and communicates the branch tube (361) with the feed pipe (33); a moving plate (371) is slidably connected to the middle of one of the side walls of the rectangular tube (370); a supplementary closing component (372) which is plugged into and matches the moving plate (371) is installed on the inner wall of the rectangular tube (370) away from the moving plate (371); one end of the moving plate (371) penetrates through one of the side walls arranged in the width direction of the smoke gathering box (34) and is connected to the outer wall of the smoke gathering box (34) via a tension spring (373). A sealing component for sealing the air hole (35) corresponding to the movable plate (371) is provided between the movable plate (371) and the corresponding smoke gathering box (34). When the movable plate (371) and the supplementary closing component (372) are plugged together to disconnect the branch pipe (361) from the feed pipe (33), the movable plate (371) drives the sealing component to close the air hole (35). The two upper and lower corresponding movable plates (371) pass through one end of the smoke gathering box (34) and are jointly equipped with a connecting frame (374). A push rod (375) is installed in the middle of the connecting frame (374).

2. A rotary kiln for calcining cement clinker according to claim 1, characterized in that: The sealing component comprises an ear plate (350) installed on the inner wall of the smoke gathering box (34), the ear plate (350) is connected to a push rod (351) which slides up and down, one end of the push rod (351) is installed with a conical sealing plug (352) aligned with the corresponding air hole (35), the side wall of the movable plate (371) is installed with a movable guide bar (353), the inner wall of the smoke gathering box (34) is provided with a storage groove for accommodating the movable guide bar (353), the end surface of the movable guide bar (353) close to the corresponding air hole (35) is provided with a track groove (354), one end of the push rod (351) away from the ear plate (350) is slidably connected in the track groove (354), and the other end of the push rod (351) is slidably connected in the track groove (354) through a rotatably connected roller, and the track groove (354) consists of an inclined section and a horizontal section.

3. A rotary kiln for calcining cement clinker according to claim 1, characterized in that: The adjusting driving group (38) comprises a push head (380) arranged along the length direction of the rectangular cylinder (30) and installed on one side outer wall arranged along the width direction thereof. The push heads (380) correspond to the push rods (375) one by one. The plurality of push heads (380) are arranged in a stepped manner. The push heads (380) are wedge-shaped structures with the inclined surfaces facing downward and close to the corresponding push rods (375). The plurality of push heads (380) are connected by a connecting plate (381), and a lifting driving component for driving the push heads to move is installed on the connecting plate (381).

4. A rotary kiln for calcining cement clinker according to claim 1, characterized in that: The movable plate (371) is provided with two limit assemblies arranged along its length direction, the limit assemblies being circular frame bars (390) sleeved on the movable plate (371), one circular frame bar (390) being located inside the smoke gathering box (34), and the other circular frame bar (390) being located outside the smoke gathering box (34), and sealing gaskets being installed on opposite surfaces of the two circular frame bars (390).

5. The rotary kiln for calcining cement clinker according to claim 1, characterized in that: The material delivery pipeline (33) is located in the middle of the smoke chamber channel (32).

6. The rotary kiln for calcining cement clinker according to claim 1, characterized in that: The supplementary closing component (372) is a triangular bar connected to the inner wall of the rectangular tube (370).

7. The rotary kiln for calcining cement clinker according to claim 1, characterized in that: A guide arc plate (391) is installed on the inner wall of the main pipe (360) connected to the kiln body cylinder (1).

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