Novel coal injection duct special for dry-process cement kiln tail
By driving the main and auxiliary pulverized coal injection pipes to rotate through the turbine fan and linkage components, uniform mixing and combustion of pulverized coal are achieved in the kiln, solving the problem of uneven combustion caused by the pulverized coal injection pipe at the kiln tail, and improving the calcination quality and product stability of cement clinker.
Patent Information
- Application Number
- CN202422977295.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-12-04
AI Technical Summary
The existing coal injection pipe at the kiln tail causes uneven mixing of pulverized coal in the kiln, which affects the burning quality of cement clinker and may result in local over-burning or under-burning, reducing the quality stability of cement products.
The main and auxiliary pulverized coal injection pipes are driven to rotate by a turbine fan and linkage components, which achieves full mixing of pulverized coal and air, and expands the injection range through multiple auxiliary pipes to ensure uniform combustion of pulverized coal in the kiln.
It improves the firing quality of cement clinker, avoids local over-firing or under-firing, and enhances the quality stability of cement products.
Smart Images
Figure CN223525130U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of cement production equipment, in particular to a special coal injection pipe for a new dry process cement kiln tail. BACKGROUND
[0002] In the new dry process cement production process, coal injection operation at the kiln tail plays a crucial role in the sintering quality of cement clinker and the thermal stability of the whole production system. The existing kiln tail coal injection pipe has some deficiencies in actual application.
[0003] When the traditional coal injection pipe is used, the coal wind mixture output by the pipe is usually directly injected into the kiln head, the coal powder is relatively concentrated, the coal powder cannot be fully and uniformly mixed with the material for combustion in the kiln, the sintering quality of the cement clinker is affected, local overburning or underburning may occur, and the quality stability of the cement product is reduced. Therefore, the special coal injection pipe for the new dry process cement kiln tail is proposed to solve the above problems. CONTENT OF THE UTILITY MODEL
[0004] In order to solve the problem that the coal wind mixture output by the pipe is usually directly injected into the kiln head, the coal powder is relatively concentrated, and the coal powder cannot be fully and uniformly mixed with the material for combustion in the kiln, affecting the sintering quality of the cement clinker, the application provides a special coal injection pipe for the new dry process cement kiln tail.
[0005] The special coal injection pipe for the new dry process cement kiln tail provided by the application adopts the following technical scheme:
[0006] A special coal injection pipe for the new dry process cement kiln tail, comprising a wind pipe, a coal powder pipe is arranged above the wind pipe, the coal powder pipe is in communication with the inner cavity of the wind pipe, one end of the wind pipe is fixedly connected with a connecting pipe, and the outer wall of the end of the connecting pipe away from the wind pipe is rotatably connected with a coal injection main pipe;
[0007] The inner wall of the wind pipe is rotatably connected with a turbine fan through a shaft ring, the outer wall of the turbine fan is provided with a linkage assembly for driving the coal injection main pipe to rotate synchronously with the turbine fan;
[0008] The linkage assembly comprises a connecting rod, a transmission shaft and a gear ring, the connecting rod is rotatably connected to the outer wall of the wind pipe, a bevel gear two is fixedly connected to the bottom end of the connecting rod, a bevel gear three is fixedly connected to the top end of the connecting rod, the transmission shaft is rotatably connected to the top outer wall of the wind pipe and the connecting pipe through a plurality of shaft seats, a bevel gear four is fixedly connected to one end of the transmission shaft, and a driving gear is fixedly connected to the other end of the transmission shaft, a bevel gear one is rotatably connected to the outer wall of the side of the shaft ring away from the turbine fan, and the bevel gear one and the turbine fan are fixedly connected through a rotating shaft.
[0009] Preferably, the bevel gear one is engaged with the bevel gear two, the bevel gear three is engaged with the bevel gear four, and the drive gear is engaged with the gear ring.
[0010] Preferably, the coal injection main pipe is fixedly connected with a plurality of auxiliary injection pipes outside the outer wall of the one end of the connecting pipe, the plurality of auxiliary injection pipes are evenly distributed in the circumferential array, and the plurality of auxiliary injection pipes are in communication with the inside of the coal injection main pipe.
[0011] Preferably, a plurality of balls are arranged between the coal injection main pipe and the outer wall of the connecting pipe, the plurality of balls are rollingly connected to the inner wall of the coal injection main pipe, and the plurality of balls are evenly distributed in the circumferential array.
[0012] To sum up, the application has the following beneficial technical effects:
[0013] When the airflow drives the turbine fan to rotate, the turbine fan can scatter the pulverized coal and mix the pulverized coal with the airflow, and the turbine fan is driven to rotate by the linkage assembly at the same time, the coal injection main pipe is driven to rotate when the coal injection main pipe rotates to spray the pulverized coal, the plurality of auxiliary injection pipes are driven to rotate, the plurality of auxiliary injection pipes can rotate around the coal injection main pipe to spray the pulverized coal, the spraying range of the pulverized coal in the kiln is increased, the pulverized coal is fully and uniformly mixed with the material in the kiln, the burning quality of the cement clinker is effectively improved, the local overburning or underburning is avoided, and the quality stability of the cement product is improved. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 is a whole schematic view of the application embodiment;
[0015] Figure 2 is a three-dimensional schematic view of the application embodiment;
[0016] Figure 3 is a first partial cross-sectional view of the application embodiment;
[0017] Figure 4 is a second partial cross-sectional view of the application embodiment.
[0018] BRIEF DESCRIPTION OF DRAWINGS: 1, air pipe; 2, pulverized coal pipe; 3, connecting pipe; 4, coal injection main pipe; 5, auxiliary injection pipe; 6, shaft ring; 7, turbine fan; 8, bevel gear one; 9, connecting rod; 10, bevel gear two; 11, bevel gear three; 12, shaft seat; 13, transmission shaft; 14, bevel gear four; 15, drive gear; 16, gear ring; 17, ball. DETAILED DESCRIPTION
[0019] The application will be described in further detail below with reference to the accompanying drawings. Figures 1-4 The application will be described in further detail below with reference to the accompanying drawings.
[0020] The application embodiment discloses a novel coal injection pipe special for a kiln tail of a new dry process cement kiln. Referring toFigures 1-4 The application discloses a special coal injection pipe for a new dry process cement kiln tail, which comprises a wind pipe 1, a coal powder pipe 2 arranged above the wind pipe 1, the coal powder pipe 2 being communicated with an inner cavity of the wind pipe 1, and a connecting pipe 3 fixedly connected to one end of the wind pipe 1.
[0021] The inner wall of the wind pipe 1 is rotatably connected with a turbine fan 7 through an axle ring 6, and the outer wall of the turbine fan 7 is provided with a linkage assembly for driving the coal injection main pipe 4 to rotate synchronously with the turbine fan 7.
[0022] The linkage assembly comprises a connecting rod 9, a transmission shaft 13 and a gear ring 16, the connecting rod 9 is rotatably connected to the outer wall of the wind pipe 1, the bottom end of the connecting rod 9 is fixedly connected with a bevel gear two 10, and the top end of the connecting rod 9 is fixedly connected with a bevel gear three 11, the transmission shaft 13 is rotatably connected to the top outer wall of the wind pipe 1 and the connecting pipe 3 through a plurality of shaft seats 12, one end of the transmission shaft 13 is fixedly connected with a bevel gear four 14, and the other end of the transmission shaft 13 is fixedly connected with a driving gear 15, the outer wall of the side, away from the turbine fan 7, of the axle ring 6 is rotatably connected with a bevel gear one 8, and the bevel gear one 8 is fixedly connected with the turbine fan 7 through a rotating shaft.
[0023] The bevel gear one 8 is engaged with the bevel gear two 10, the bevel gear three 11 is engaged with the bevel gear four 14, and the driving gear 15 is engaged with the gear ring 16.
[0024] The outer wall of the end, away from the connecting pipe 3, of the coal injection main pipe 4 is fixedly connected with a plurality of auxiliary injection pipes 5, the plurality of auxiliary injection pipes 5 are evenly distributed in a circumferential array at equal intervals, and the plurality of auxiliary injection pipes 5 are communicated with the inside of the coal injection main pipe 4.
[0025] A plurality of balls 17 are arranged between the outer wall of the coal injection main pipe 4 and the connecting pipe 3, the plurality of balls 17 are rollingly connected to the inner wall of the coal injection main pipe 4, the plurality of balls 17 are evenly distributed in a circumferential array at equal intervals, and when the coal injection main pipe 4 rotates on the outer wall of the connecting pipe 3, the plurality of balls 17 roll on the surface of the connecting pipe 3, so that the direct friction between the coal injection main pipe 4 and the connecting pipe 3 is changed into rolling friction, the friction is reduced, and the rotation smoothness of the coal injection main pipe 4 is improved.
[0026] The application discloses a special coal injection pipe for a new dry process cement kiln tail, which comprises a wind pipe 1, a coal powder pipe 2 arranged above the wind pipe 1, the coal powder pipe 2 being communicated with an inner cavity of the wind pipe 1, and a connecting pipe 3 fixedly connected to one end of the wind pipe 1.
[0027] At the same time, the turbine fan 7 rotates through the rotating shaft inside the shaft ring 6 to drive the bevel gear one 8 to rotate, the bevel gear one 8 drives the bevel gear two 10 to rotate, the bevel gear two 10 drives the bevel gear three 11 to rotate through the connecting rod 9, the bevel gear three 11 drives the bevel gear four 14 to rotate, the bevel gear four 14 drives the driving gear 15 to rotate through the transmission shaft 13, the driving gear 15 drives the gear ring 16 to rotate, the gear ring 16 drives the coal injection main pipe 4 to rotate on the outer wall of the connecting pipe 3, the coal injection main pipe 4 rotates to spray the pulverized coal, and a plurality of auxiliary injection pipes 5 can rotate to spray the pulverized coal around the coal injection main pipe 4, so that the pulverized coal can be fully and uniformly mixed with the material in the kiln, the burning quality of the cement clinker is effectively improved, the local overburning or underburning is avoided, and the quality stability of the cement product is improved.
[0028] Finally, it should be pointed out that: first, in the description of the present application, it should be pointed out that unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, which can be mechanical connection or electrical connection, or the communication between two elements, or direct connection, "up", "down", "left", "right" and the like are only used to indicate the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may change;
[0029] Secondly: the utility model discloses the embodiment of the drawings, only relate to the structure involved in the embodiment of the present disclosure, other structures can refer to the usual design, under the condition of no conflict, the same embodiment and different embodiments of the utility model can be combined with each other;
[0030] Finally: the above only for the preferred embodiment of the utility model, and does not limit the utility model, any modification, equivalent replacement, improvement etc. within the spirit and principle of the utility model, should be included in the protection scope of the utility model.
[0031] The above are the preferred embodiments of the present application, and do not limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.
Claims
1. A new type of coal injection pipe for the kiln tail of a new dry process cement kiln, comprising a wind pipe (1), characterized in that: The upper part of the air pipe (1) is provided with a pulverized coal pipe (2) which is communicated with the inner cavity of the air pipe (1), one end of the air pipe (1) is fixedly connected with a connecting pipe (3), and the outer wall of the end of the connecting pipe (3) away from the air pipe (1) is rotatably connected with a coal injection main pipe (4). The inner wall of the air pipe (1) is rotatably connected with a turbine fan (7) through a shaft ring (6), and the outer wall of the turbine fan (7) is provided with a linkage assembly for driving the coal injection main pipe (4) to rotate synchronously with the turbine fan (7). The linkage assembly comprises a connecting rod (9), a transmission shaft (13) and a gear ring (16), the connecting rod (9) is rotatably connected to the outer wall of the air pipe (1), the bottom end of the connecting rod (9) is fixedly connected with a bevel gear two (10), and the top end of the connecting rod (9) is fixedly connected with a bevel gear three (11), the transmission shaft (13) is rotatably connected to the top outer wall of the air pipe (1) and the connecting pipe (3) through a plurality of shaft seats (12), one end of the transmission shaft (13) is fixedly connected with a bevel gear four (14), and the other end of the transmission shaft (13) is fixedly connected with a driving gear (15), the outer wall of the side of the shaft ring (6) away from the turbine fan (7) is rotatably connected with a bevel gear one (8), and the bevel gear one (8) and the turbine fan (7) are fixedly connected through a rotating shaft.
2. A new type of coal injection pipe for the kiln tail of a cement kiln according to claim 1, characterized in that: The bevel gear one (8) is engaged with the bevel gear two (10), the bevel gear three (11) is engaged with the bevel gear four (14), and the driving gear (15) is engaged with the gear ring (16).
3. A new type of coal injection pipe for the kiln tail of a cement kiln according to claim 2, characterized in that: The outer wall of the end of the coal injection main pipe (4) away from the connecting pipe (3) is fixedly connected with a plurality of auxiliary injection pipes (5), a plurality of the auxiliary injection pipes (5) are evenly distributed in a circumferential array at equal intervals, and the plurality of auxiliary injection pipes (5) are communicated with the inside of the coal injection main pipe (4).
4. A new type of coal injection pipe for the kiln tail of a dry process cement kiln according to claim 1, characterized in that: A plurality of rolling balls (17) are arranged between the outer wall of the coal injection main pipe (4) and the connecting pipe (3), the plurality of rolling balls (17) are rollingly connected to the inner wall of the coal injection main pipe (4), and the plurality of rolling balls (17) are evenly distributed in a circumferential array at equal intervals.