Coal gangue calcining device
By installing a screen and drying components in front of the rotary kiln, and using high-temperature flue gas and agitator impeller crushing plates to process coal gangue, the problems of insufficient reaction and unqualified particle size caused by coal gangue agglomeration were solved, and qualified preparation of cement clinker was achieved.
Patent Information
- Application Number
- CN202520010749.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-03
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-01-03
AI Technical Summary
Existing rotary kilns cannot effectively dry and screen coal gangue during calcination, leading to coal gangue agglomeration, which affects the reaction effect and the particle size of cement clinker, resulting in substandard cement clinker.
A coal gangue calcination device was designed, comprising a screen and a drying component inside the shell. The coal gangue is screened by the screen and dried by the drying component. High-temperature flue gas heating is used, combined with an agitator impeller and a crushing plate, to break up and dry the agglomerated coal gangue, ensuring that the particle size is qualified.
Effectively dispersing and drying coal gangue ensures that the coal gangue entering the rotary kiln has the required particle size, improves the quality of cement clinker, solves the problem of insufficient reaction caused by agglomeration, and ensures that the prepared cement clinker meets the standards.
Smart Images
Figure CN223691499U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to coal gangue calcining technical field, concretely relates to a coal gangue calcining device. BACKGROUND
[0002] Coal gangue is a kind of solid waste discharged in the process of coal mining and coal washing, is a kind of black gray rock with low carbon content and hard than coal in the process of coal formation, including roadway driving gangue in the process of roadway driving, gangue mined from roof, floor and interlayer in the process of mining and washing gangue picked in the process of coal washing, and its main components are Al2O3 and SiO2, which are the main components of cement clinker, so coal gangue can be used as raw material to prepare cement clinker.
[0003] The existing coal gangue is put into the cement kiln from the rotary kiln tail, and the heat generated by the combustion of coal powder sprayed from the rotary kiln head is used to calcine the raw materials in the rotary kiln to prepare cement clinker. However, the existing rotary kiln cannot dry and screen the coal gangue during calcination, so the coal gangue entering the rotary kiln may be caked due to washing and moisture, and the caked coal gangue is directly calcined in the rotary kiln, which affects the contact reaction of coal gangue with other raw materials and the particle size of clinker, so that the prepared cement clinker is substandard.
[0004] The information disclosed in this background section is intended only to increase an understanding of the general background of the present utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms prior art that is already known to those of ordinary skill in the art. UTILITY MODEL CONTENT
[0005] The utility model aims at providing a coal gangue calcining device, which can solve the problem of insufficient reaction of raw materials and large particle size of prepared cement clinker caused by calcination of caked coal gangue.
[0006] In order to achieve the above-mentioned purpose, the technical scheme provided by a specific embodiment of the utility model is as follows:
[0007] A coal gangue calcining device for treating coal gangue entering the rotary kiln for calcination, comprising:
[0008] The calcination pretreatment device comprises a shell, a screen is installed in the shell, and the screen can screen the coal gangue to screen out the coal gangue with unqualified particle size. A rotating shaft is rotatably connected in the shell, a pair of stirring impellers are installed on the side wall of the rotating shaft, and the pair of stirring impellers are arranged above the screen. The rotation of the rotating shaft drives the pair of stirring impellers to rotate, so that the materials on the screen can be stirred, and the screening efficiency of the screen for coal gangue is improved.
[0009] The drying assembly comprises a first drying piece and a second drying piece, which are used for drying coal gangue respectively, so that the coal gangue is dried and clumping of the coal gangue is avoided. The first drying piece and the second drying piece are both installed in a shell, and the first drying piece is installed above the second drying piece, so that the coal gangue is dried by the first drying piece first and then dried by the second drying piece. The interiors of the first drying piece and the second drying piece are both hollow structures, and a plurality of first material flow pipes are installed on the wall plates at the upper and lower ends of the first drying piece in a penetrating manner, so that the coal gangue flows from the upper end to the lower end of the first material flow pipe. A plurality of second material flow pipes are installed on the wall plates at the upper and lower ends of the second drying piece in a penetrating manner, so that the coal gangue flows from the upper end to the lower end of the second material flow pipe. The coal gangue flows in the first drying piece through the first material flow pipe and flows in the second drying piece through the second material flow pipe, so that the coal gangue can be dried by the first drying piece and the second drying piece.
[0010] In one or more embodiments of the present application, bearings are installed on the top wall plate of the shell and the screen, and the rotating shaft is installed in the bearings on the shell and the screen, so that the rotating shaft can rotate when it is installed on the shell and the screen.
[0011] In one or more embodiments of the present application, a motor is installed on the upper end of the rotating shaft, and the motor drives the rotating shaft to rotate. A feeding port is installed on the top wall plate of the shell, and the coal gangue is put into the shell through the feeding port for processing. A discharging port is installed on the bottom wall plate of the shell, and the lower end of the discharging port is installed on the rotary kiln, so that the processed coal gangue enters the rotary kiln for calcination.
[0012] In one or more embodiments of the present application, a discharging port is arranged on the side wall of the shell, and the bottom of the discharging port is flush with the upper surface of the screen. When the coal gangue is screened by the shell, the materials with unqualified particle size are discharged through the discharging port.
[0013] In one or more embodiments of the present application, the outer side walls of the first drying piece and the second drying piece are tightly sealed with the inner side walls of the shell, and the second drying piece is arranged above the screen, so that the processed coal gangue dried by the first drying piece and the second drying piece is screened by the screen.
[0014] In one or more embodiments of the present application, gaps are reserved between the outer side walls of the plurality of first material flow pipes and between the outer side walls of the plurality of second material flow pipes. The inner diameter of the first material flow pipe is larger than that of the second material flow pipe, so that the coal gangue is dried when flowing in the first material flow pipe with a large aperture and then dried when flowing in the second material flow pipe with a small aperture.
[0015] In one or more embodiments of the utility model, the first drying piece and the second drying piece are provided with air inlet pipes on the air inlets, and the high-temperature flue gas can be introduced into the first drying piece and the second drying piece through the air inlet pipes. The hot flue gas flows through the gaps of the first material pipes in the first drying piece and flows through the gaps of the second material pipes in the second drying piece, so that the first material pipes and the second material pipes are heated by the hot flue gas, and the first material pipes and the second material pipes can dry the coal gangue.
[0016] In one or more embodiments of the utility model, the air inlet pipe is provided with a kiln tail flue gas conveying pipe on the air inlet, and the air outlet of the return pipe is installed on the kiln tail flue gas conveying pipe. The kiln tail flue gas conveying pipe is used for conveying the high-temperature flue gas discharged from the kiln tail of the rotary kiln, so that the high-temperature flue gas conveyed by the kiln tail flue gas conveying pipe enters the first drying piece and the second drying piece through the air inlet pipe, and the high-temperature flue gas flowing out of the first drying piece and the second drying piece is returned to the kiln tail flue gas conveying pipe through the return pipe for subsequent treatment. At the same time, since the kiln tail flue gas contains particulate matter and other impurities, a simple filtering component can be provided to treat the high-temperature flue gas entering the air inlet pipe, so as to prevent the flue gas from bringing particulate matter into the first drying piece and the second drying piece.
[0017] In one or more embodiments of the utility model, the side wall of the rotating shaft is fixedly connected with two groups of crushing plates, and the two groups of crushing plates are arranged on the first drying piece and the second drying piece respectively. The rotation of the rotating shaft drives the crushing plates to rotate, so that the crushing plates can stir and crush the coal gangue, and the agglomerated coal gangue is broken up and enters the first material pipe and the second material pipe for drying, thereby improving the drying efficiency of the coal gangue.
[0018] In one or more embodiments of the utility model, the upper and lower wall plates of the first drying piece and the second drying piece are provided with sealing bearings, and the rotating shaft is installed in the sealing bearings, so that the installation of the first drying piece and the second drying piece does not affect the rotation of the rotating shaft.
[0019] Compared with the prior art, the utility model is provided with a drying assembly to dry the broken-up agglomerated coal gangue, so that the agglomerated coal gangue is broken up and dried at the same time, and the coal gangue is prevented from adhering together again. In addition, a screening assembly is provided to screen out large-particle materials in the coal gangue, so that the coal gangue entering the rotary kiln is qualified in particle size, and the prepared cement clinker is qualified. BRIEF DESCRIPTION OF DRAWINGS
[0020] In order to more clearly illustrate the technical schemes in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.
[0021] Figure 1 It is a front view of a coal gangue calcining device in an embodiment of the present application.
[0022] Figure 2 It is a sectional view of a coal gangue calcining device in an embodiment of the present application.
[0023] Figure 3 It is a sectional view of a coal gangue calcining device in an embodiment of the present application.
[0024] Figure 4 It is a schematic view of a first drying part in an embodiment of the present application. Figure 3 It is an enlarged view of A in the figure.
[0025] Figure 5 It is a schematic view of a second drying part in an embodiment of the present application.
[0026] Figure 6 It is a schematic view of a second drying part in an embodiment of the present application.
[0027] Main figure mark explanation:
[0028] 1 - calcining pretreatment device, 11 - shell, 12 - screen, 13 - rotating shaft, 14 - stirring impeller, 15 - bearing, 16 - motor, 17 - feeding port, 18 - discharging port, 19 - discharging port, 2 - drying assembly, 21 - first drying part, 22 - second drying part, 23 - first material conveying pipe, 24 - second material conveying pipe, 25 - air inlet pipe, 26 - backflow pipe, 27 - kiln tail flue gas conveying pipe, 28 - crushing plate, 29 - sealing bearing, 3 - rotary kiln. DETAILED DESCRIPTION
[0029] In order to make the person skilled in the art better understand the technical schemes in the present application, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical schemes in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.
[0030] For example, Figures 1-3As shown, the utility model discloses a coal gangue calcining device for processing coal gangue calcined into a rotary kiln, including calcining pretreatment device 1 and drying assembly 2.
[0031] As shown in the drawings, Figure 2 and Figure 3 The calcining pretreatment device 1 includes a shell 11, a screen 12 is installed in the shell 11, and the coal gangue can be screened through the screen 12 to screen out the coal gangue with unqualified particle size. A rotating shaft 13 is rotatably connected in the shell 11, and a pair of stirring impellers 14 are installed on the side wall of the rotating shaft 13. The pair of stirring impellers 14 are arranged above the screen 12, and the pair of stirring impellers 14 are driven to rotate by the rotation of the rotating shaft 13, so that the material on the screen 12 can be stirred, and the screening efficiency of the screen 12 on the coal gangue is improved.
[0032] As shown in the drawings, Figure 3 The top wall plate of the shell 11 and the screen 12 are both provided with bearings 15, and the rotating shaft 13 is installed in the bearings 15 on the shell 11 and the screen 12, so that the rotating shaft 13 can rotate when it is installed on the shell 11 and the screen 13.
[0033] As shown in the drawings, Figures 1-3 The upper end of the rotating shaft 13 is provided with a motor 16, which drives the rotating shaft 13 to rotate. The top wall plate of the shell 11 is provided with a feeding port 17, and the coal gangue is put into the shell 11 through the feeding port 17 for processing. The bottom wall plate of the shell 11 is provided with a discharge port 18, and the lower end of the discharge port 18 is installed on the rotary kiln 3, so that the processed coal gangue enters the rotary kiln 3 for calcination.
[0034] As shown in the drawings, Figure 3 The side wall of the shell 11 is provided with a discharge port 19, and the bottom of the discharge port 19 is flush with the upper surface of the screen 12. When the coal gangue is screened by the shell 11, the material with unqualified particle size can be discharged through the discharge port 19.
[0035] As shown in the drawings, Figures 2-6As shown, the drying assembly 2 comprises a first drying piece 21 and a second drying piece 22, which are respectively used for drying the coal gangue, so that the coal gangue is dried and clumping is avoided. The first drying piece 21 and the second drying piece 22 are both installed in the shell 11, and the first drying piece 21 is installed above the second drying piece 22, so that the coal gangue is first dried by the first drying piece 21 and then dried by the second drying piece 22. The interiors of the first drying piece 21 and the second drying piece 22 are both hollow structures, and a plurality of first material pipes 23 are installed on the wall plates at the upper and lower ends of the first drying piece 21 in a penetrating manner, so that the coal gangue flows from the upper end to the lower end through the first material pipes 23. A plurality of second material pipes 24 are installed on the wall plates at the upper and lower ends of the second drying piece 22 in a penetrating manner, so that the coal gangue flows from the upper end to the lower end through the second material pipes 24. Thus, the coal gangue flows in the first drying piece 21 through the first material pipes 23 and flows in the second drying piece 22 through the second material pipes 24, so that the coal gangue can be dried by the first drying piece 21 and the second drying piece 22.
[0036] As shown in Figure 3 , the outer side walls of the first drying piece 21 and the second drying piece 22 are tightly sealed with the inner side walls of the shell 11, and the second drying piece 22 is arranged above the screen 12, so that the coal gangue treated by the first drying piece 21 and the second drying piece 22 is screened by the screen 12.
[0037] As shown in Figure 3 and Figure 4 , certain gaps are reserved between the outer side walls of the plurality of first material pipes 23 and between the outer side walls of the plurality of second material pipes 24. The inner diameter of the first material pipe 23 is greater than the inner diameter of the second material pipe 24, so that the coal gangue is dried when flowing in the first material pipe 23 with a large aperture and then dried when flowing in the second material pipe 24 with a small aperture.
[0038] As shown in Figures 1-3 , the air inlet pipes 25 are installed on the air inlets of the first drying piece 21 and the second drying piece 22, so that the high-temperature flue gas can be introduced into the first drying piece 21 and the second drying piece 22 through the air inlet pipes 25. The hot flue gas flows through the gaps between the plurality of first material pipes 23 in the first drying piece 21 and flows through the gaps between the plurality of second material pipes 24 in the second drying piece 22, so that the first material pipe 23 and the second material pipe 24 are heated by the hot flue gas and can dry the coal gangue. The return pipes 26 are installed on the air outlets of the first drying piece 21 and the second drying piece 22, so that the hot flue gas flowing out of the first drying piece 21 and the second drying piece 22 is recycled through the return pipes 26.
[0039] AsFigures 1-3 As shown, the inlet of the air inlet pipe 25 is provided with a kiln tail flue gas conveying pipe 27, and the outlet of the backflow pipe 26 is provided on the kiln tail flue gas conveying pipe 27. The kiln tail flue gas conveying pipe 27 is used to convey the high-temperature flue gas discharged from the kiln tail of the rotary kiln, so that the high-temperature flue gas conveyed by the kiln tail flue gas conveying pipe 27 enters the first drying part 21 and the second drying part 22 through the air inlet pipe 25, and the high-temperature flue gas flowing out of the first drying part 21 and the second drying part 22 is backflowed to the kiln tail flue gas conveying pipe 27 through the backflow pipe 26 for subsequent treatment. At the same time, since the kiln tail flue gas contains impurities such as particulate matter, a simple filtering component can be provided to treat the high-temperature flue gas entering the air inlet pipe 25, so as to avoid the flue gas from carrying particulate matter into the first drying part 21 and the second drying part 22.
[0040] As shown in Figure 3 and Figure 4 , the side wall of the rotating shaft 13 is fixedly connected with two groups of crushing plates 28, and the two groups of crushing plates 28 are respectively arranged on the first drying part 21 and the second drying part 22. The rotation of the rotating shaft 13 drives the crushing plates 28 to rotate, so that the crushing plates 28 can stir and crush the coal gangue, so that the agglomerated coal gangue is broken up and then enters the first material conveying pipe 23 and the second material conveying pipe 24 for drying, thereby improving the drying efficiency of the coal gangue.
[0041] As shown in Figure 4 , the upper and lower wall plates of the first drying part 21 and the second drying part 22 are provided with sealing bearings 29, and the rotating shaft 13 is installed in the sealing bearings 29, so that the installation of the first drying part 21 and the second drying part 22 will not affect the rotation of the rotating shaft 13.
[0042] In use, the high-temperature flue gas discharged from the kiln tail of the rotary kiln 3 is conveyed through the kiln tail flue gas conveying pipe 27, and the high-temperature flue gas can be conveyed into the first drying part 21 and the second drying part 22 through the air inlet pipe 25, so that the high-temperature flue gas flows between the first material conveying pipes 23 in the first drying part 21 and between the second material conveying pipes 24 in the second drying part 22, so as to make the first material conveying pipes 23 and the second material conveying pipes 24 have a very high temperature; the coal gangue is poured into the shell 11 through the feeding port 17, and the coal gangue falls on the first drying part 21, is stirred and crushed by the crushing plates 28, and then enters the first material conveying pipe 23 for drying, the coal gangue dried in the first material conveying pipe 23 falls on the second drying part 22, is stirred and crushed by the crushing plates 28, and then enters the second material conveying pipe 24 for drying, and the coal gangue dried in the second material conveying pipe 24 falls on the screen 12, and is screened on the screen 12 through the stirring of the stirring impeller 14, so that the coal gangue is broken up, dried and screened, and the treated coal gangue enters the rotary kiln 3 through the discharge port 18 for calcination, so as to prepare cement clinker.
[0043] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, the scope of the present application being defined by the claims appended hereto rather than by the above description, and all the changes which fall within the meaning and the scope of the equivalent elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.
[0044] Furthermore, it should be understood that although the present specification is described in terms of embodiments, not every embodiment according to the present specification needs to exhibit each and every characteristic specified in the present specification. The specification can also be described in terms of a single preferred embodiment, it being understood that this single preferred embodiment can exhibit not every aspect or feature of the present specification. The specification can also be described in terms of a generic statement that the disclosure can include one, some, or all of a list of features. It is further understood that the specification is to be considered as a whole and not with reference to a single feature or design element alone.
Claims
1. A coal gangue calcination device for processing coal gangue entering a rotary kiln for calcination, characterized in that, The utility model relates to a calcination pretreatment device, including the shell, the shell is installed with screen cloth, the shell is rotatably connected with rotating shaft, a pair of stirring vane is installed on the lateral wall of rotating shaft, a pair of stirring vane is arranged above screen cloth, drying assembly includes first drying piece and second drying piece, first drying piece and second drying piece are installed in the shell, first drying piece is installed above second drying piece, the inside of first drying piece and second drying piece is set up as hollow structure, a plurality of first material pipes are installed on the wallboard of first drying piece upper and lower ends in the mode of through, a plurality of second material pipes are installed on the wallboard of second drying piece upper and lower ends in the mode of through. The top wall of the shell and the screen are provided with bearings, and the rotating shaft is installed in the bearings of the shell and the screen. The upper end of the rotating shaft is provided with a motor, the top wall of the shell is provided with an inlet, and the bottom wall of the shell is provided with an outlet.
2. The coal gangue calcining device according to claim 1, characterized in that, The side wall of the shell is provided with a discharge port, and the bottom of the discharge port is flush with the upper surface of the screen.
3. The coal gangue calcining device according to claim 2, characterized in that, The outer side walls of the first drying piece and the second drying piece are tightly sealed with the inner side walls of the shell, and the second drying piece is arranged above the screen.
4. The coal gangue calcining device according to claim 3, characterized in that, The outer side walls of the first drying piece and the second drying piece are tightly sealed with the inner side walls of the shell, and the second drying piece is arranged above the screen.
5. The coal gangue calcining device according to claim 1, characterized in that, The outer side walls of the first drying piece and the second drying piece are tightly sealed with the inner side walls of the shell, and the second drying piece is arranged above the screen.
6. The coal gangue calcining device according to claim 1, characterized in that, The outer side walls of the first drying piece and the second drying piece are tightly sealed with the inner side walls of the shell, and the second drying piece is arranged above the screen.
7. The coal gangue calcining device according to claim 1, characterized in that, The outer side walls of the first drying piece and the second drying piece are tightly sealed with the inner side walls of the shell, and the second drying piece is arranged above the screen.
8. The coal gangue calcining device according to claim 7, characterized in that, The outer side walls of the first drying piece and the second drying piece are tightly sealed with the inner side walls of the shell, and the second drying piece is arranged above the screen.
9. The coal gangue calcining device according to claim 1, characterized in that, The outer side walls of the first drying piece and the second drying piece are tightly sealed with the inner side walls of the shell, and the second drying piece is arranged above the screen.
10. The coal gangue calcining device according to claim 9, characterized in that, The outer side walls of the first drying piece and the second drying piece are tightly sealed with the inner side walls of the shell, and the second drying piece is arranged above the screen. The outer side walls of the first drying piece and the second drying piece are tightly sealed with the inner side walls of the shell, and the second drying piece is arranged above the screen. The outer side walls of the first drying piece and the second drying piece are tightly sealed with the inner side walls of the shell, and the second drying piece is arranged above the screen.