Calcination device for cement production

Abstract

The invention relates to the technical field of cement production equipment, and discloses a calcining device for cement production. A combustion seat furnace fixedly sleeves the surface of a calcining furnace main body and is close to the bottom, a fuel placing port is formed in one side of the surface of the combustion seat furnace, and a closed top cover movably sleeves the top of the calcining furnace main body; a first motor is fixedly connected to the top of the closed top cover, a stirring frame is movably connected to the position, located at the bottom of the closed top cover, in the calcining furnace body, and supporting frame plates are fixedly connected to the positions, close to the top, of the two sides of the surface of the calcining furnace body. When preheated cement raw materials enter the calcining furnace main body, a first motor drives a stirring frame to rotate, so that the stirring frame drives a stirring rod and a stirring blade to rotate to fully stir the cement raw materials, and incomplete calcining of the cement raw materials is prevented; and meanwhile, the preheated cement raw material can avoid temperature fluctuation in the calcining furnace main body, and the stability of the internal temperature is improved.

Description

Technical Field

[0001] The invention relates to the technical field of cement production equipment, and more specifically to a calcining device for cement production. Background Art

[0002] Cement is a powdery, hydraulic, inorganic cementitious material. It becomes a slurry after adding water and stirring. It can harden in the air or in water, and can firmly bind materials such as sand and stone together. Cement needs to be calcined during production. The purpose of calcination is to melt cement raw materials (materials obtained by grinding cement raw materials to a certain fineness) to obtain silicate cement clinker with calcium silicate as the main component.

[0003] However, the existing calcining devices will generate a large amount of waste gas and dust during actual calcination, which will cause harm to the surrounding environment and the health of operators. In addition, the calcination process requires a temperature of up to 1400℃-1600℃, which requires a lot of energy, and the emission of waste gas will cause a lot of energy loss, thereby increasing cost expenditure. In addition, the temperature inside the calcining device is extremely high and has large fluctuations, and the temperature control is relatively complicated. The uneven temperature inside the calcining device may lead to incomplete calcination of the material, affecting the quality of the cement clinker. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a calcining device for cement production to solve the technical problems raised in the background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a calcining device for cement production comprises a calcining furnace main body, characterized in that: a combustion seat furnace is fixedly sleeved on the surface of the calcining furnace main body and near the bottom position, a fuel placement port is opened on one side of the surface of the combustion seat furnace, a closed top cover is movably sleeved on the top position of the calcining furnace main body, a first motor is fixedly connected to the top position of the closed top cover, a stirring frame is movably connected inside the calcining furnace main body and located at the bottom position of the closed top cover, support frame plates are fixedly connected on both sides of the surface of the calcining furnace main body and near the top position, a dust storage box is fixedly connected at the top position of the support frame plate on one side of the calcining furnace main body, a preheating insulation shell is fixedly connected at the top position of the support frame plate on the other side of the calcining furnace main body, waste heat guide pipes are fixedly connected on both sides of the surface of the dust storage box and the preheating insulation shell near the bottom position, a feed slide pipe is opened on the surface position of the preheating insulation shell near one side of the calcining furnace main body, and the feed slide pipe is fixedly connected to the top of the closed top cover near the inner position of one side of the preheating insulation shell.

[0006] By providing a stirring frame, a stirring rod and a stirring blade, when the preheated cement raw material enters the interior of the calcining furnace main body, the stirring frame is driven to rotate by the first motor, so that the stirring frame drives the stirring rod and the stirring blade to rotate to fully stir the cement raw material, thereby preventing incomplete calcination of the cement raw material. At the same time, the preheated cement raw material can avoid temperature fluctuations inside the calcining furnace main body, improve the stability of the internal temperature, and thus improve the quality of cement clinker.

[0007] In a preferred embodiment, an exhaust hole is provided at one side of the top of the closed top cover, a feed hole is provided at a position where the closed top cover is fixedly connected to the feed slide pipe, neatly arranged stirring rods are provided at the bottom of the stirring frame, stirring blades are fixedly connected to the surface of the stirring rods, and a rotation limit block is provided at the top of the stirring rods.

[0008] By providing a stirring frame, a stirring rod and a stirring blade, when the preheated cement raw material enters the interior of the calcining furnace main body, the stirring frame is driven to rotate by the first motor, so that the stirring frame drives the stirring rod and the stirring blade to rotate to fully stir the cement raw material, thereby preventing incomplete calcination of the cement raw material. At the same time, the preheated cement raw material can avoid temperature fluctuations inside the calcining furnace main body, improve the stability of the internal temperature, and thus improve the quality of cement clinker.

[0009] In a preferred embodiment, the top position of the stirring frame is provided with neatly arranged feeding holes, the top position of the stirring frame is provided with a connecting shaft, and the bottom position of the stirring frame is provided with neatly arranged self-rotating hole grooves. By providing the feeding holes and the self-rotating hole grooves, when the preheated cement raw meal enters the inside of the calcining furnace body, the raw meal can reach the bottom position of the calcining furnace body through the feeding holes, and the stirring rod can rotate while rotating and stirring the cement raw meal through the self-rotating hole groove, thereby improving the flexibility of cement raw meal mixing and improving the uniformity of cement raw meal calcination heating.

[0010] In a preferred embodiment, a dust storage cavity is provided inside the dust storage box, a filter screen is fixedly connected to the inside of the dust storage cavity, a circular through hole is provided in the dust storage box at a position connected to the waste heat diversion pipe, a connecting pipe is fixedly connected to the surface of the dust storage box close to the calcining furnace body, and one end of the connecting pipe away from the dust storage box is movably sleeved on one side of the top of the closed top cover. By providing the dust storage box and the filter screen, harmful particles and dust in the exhaust gas generated during the calcination of cement can be blocked to prevent dust from entering the air with the exhaust gas and causing harm to the surrounding air and workers.

[0011] In a preferred embodiment, an insulation box is movably sleeved inside the preheating and insulation shell and near the bottom end, an exhaust pipe is movably sleeved inside the insulation box and near the top end, an exhaust pipe is fixedly sleeved on the side of the preheating and insulation shell away from the calcining furnace body and near the bottom, an insulation cover is movably sleeved at the top of the preheating and insulation shell, a second motor is fixedly connected to the top of the insulation cover, a stirring shaft is transmission-connected to the bottom of the second motor, the stirring shaft is movably sleeved inside the heat conduction plate, and a second support plate is fixedly connected to the surface of the side of the insulation cover away from the calcining furnace body. The preheating and insulation shell, the insulation cover, the second motor and the stirring shaft are provided to fully recover the heat energy of waste heat, and reduce heat loss through the preheating and insulation shell and the insulation cover, while the second motor drives the stirring shaft to uniformly preheat the cement raw material.

[0012] In a preferred embodiment, the preheating and insulation shell is fixedly connected to a first support plate at a surface position on one side away from the calcining furnace body, the first support plate is fixedly connected to a third motor at a bottom position, the first support plate is fixedly connected to limit rods at both sides of the top of the first support plate, a threaded rod is movably sleeved at the top of the first support plate and located at a middle position adjacent to the first support plate, the threaded rod is transmission-connected to the third motor, the limit rod and the threaded rod are movably sleeved at a position inside the second support plate, and the first support plate, the second support plate, the limit rod and the threaded rod are facilitated to rotate the threaded rod restricted by the limit rod through the first support plate, when calcining work is required, so that the threaded rod drives the second support plate and the insulation cover to rise, thereby driving the cement raw material inside the preheating and insulation shell to reach the position of the feed slide pipe, so that the cement raw material enters the calcining furnace body for calcination.

[0013] Technical effects and advantages of the present invention:

[0014] 1. The present invention is provided with a dust storage box and a filter screen, which is beneficial to block the harmful particles and dust in the waste gas generated during cement production and calcination, and prevent the dust from entering the air with the waste gas and causing harm to the surrounding air and workers;

[0015] 2. The present invention is provided with a dust storage box, a waste heat guide pipe, a preheating insulation shell, an insulation box, and a heat conduction plate, which is beneficial to the high-temperature exhaust gas generated during cement production and calcination to block the internal particulate dust through the dust storage box, and to guide the relatively clean high-temperature exhaust gas into the insulation box inside the preheating insulation shell through the waste heat guide pipe, so that the heat conduction plate preheats the cement production raw material on the top, thereby improving the energy utilization rate and avoiding the waste of resources caused by energy loss;

[0016] 3. The present invention is provided with a stirring frame, a stirring rod and a stirring blade, which is conducive to the stirring frame being driven to rotate by the first motor when the preheated cement raw material enters the interior of the calcining furnace body, so that the stirring frame drives the stirring rod and the stirring blade to rotate to fully stir the cement raw material, thereby preventing the cement raw material from being incompletely calcined. At the same time, the preheated cement raw material can avoid temperature fluctuations inside the calcining furnace body, improve the stability of the internal temperature, and thus improve the quality of cement clinker; BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic cross-sectional view of the overall structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 3 It is a schematic cross-sectional view of the closed top cover structure of the present invention.

[0020] Figure 4 It is a schematic cross-sectional view of the stirring frame structure of the present invention.

[0021] Figure 5 It is a schematic diagram of the stirring rod structure of the present invention.

[0022] Figure 6 It is a schematic cross-sectional view of the dust storage box structure of the present invention.

[0023] Figure 7 It is a schematic cross-sectional view of the preheating and heat-insulating shell structure of the present invention.

[0024] The accompanying drawings are marked as follows: 1. calcining furnace body; 2. combustion seat furnace; 3. fuel placement port; 4. closed top cover; 401. exhaust hole; 402. feed hole; 5. first motor; 6. stirring frame; 601. stirring rod; 602. feeding hole; 603. connecting shaft; 604. self-rotation hole groove; 7. support frame plate; 8. dust storage box; 801. dust storage chamber; 9. preheating insulation shell; 10. waste heat guide pipe; 11. feed slide pipe; 12. stirring blade; 13. self-rotation limit block; 14. filter screen; 15. circular through hole; 16. connecting pipe; 17. insulation box; 18. heat conduction plate; 19. exhaust pipe; 20. insulation cover; 21. second motor; 22. stirring shaft; 23. first support plate; 24. third motor; 25. limit rod; 26. threaded rod; 27. second support plate. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative. The calcining device for cement production involved in the present invention is not limited to the various structures recorded in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0026] Reference Figure 1-Figure 7 As shown, the present invention provides a calcining device for cement production, including a calcining furnace main body 1, characterized in that: a combustion seat furnace 2 is fixedly sleeved on the surface of the calcining furnace main body 1 and near the bottom position, a fuel placement port 3 is opened on one side of the surface of the combustion seat furnace 2, a closed top cover 4 is movably sleeved on the top position of the calcining furnace main body 1, a first motor 5 is fixedly connected to the top position of the closed top cover 4, a stirring frame 6 is movably connected inside the calcining furnace main body 1 and located at the bottom position of the closed top cover 4, support frame plates 7 are fixedly connected on both sides of the surface of the calcining furnace main body 1 and near the top position, a dust storage box 8 is fixedly connected to the top position of the support frame plate 7 on one side of the calcining furnace main body 1, and a preheating insulation shell 9 is fixedly connected to the top position of the support frame plate 7 on the other side of the calcining furnace main body 1, waste heat guide pipes 10 are fixedly connected on both sides of the surface of the dust storage box 8 and the preheating insulation shell 9 near the bottom position, a feed slide pipe 11 is opened on the surface position of the preheating insulation shell 9 near one side of the calcining furnace main body 1, and the feed slide pipe 11 is fixedly connected to the top of the closed top cover 4 near the inner position of the preheating insulation shell 9.

[0027] In the present embodiment, by providing a stirring frame 6, a stirring rod 601, and a stirring blade 12, it is beneficial for the first motor 5 to drive the stirring frame 6 to rotate when the preheated cement raw material enters the interior of the calcining furnace main body 1, so that the stirring frame 6 drives the stirring rod 601 and the stirring blade 12 to rotate to fully stir the cement raw material, thereby preventing incomplete calcination of the cement raw material. At the same time, the preheated cement raw material can avoid temperature fluctuations inside the calcining furnace main body 1, improve the stability of the internal temperature, and thus improve the quality of the cement clinker.

[0028] Reference Figure 2-Figure 5 As shown, an exhaust hole 401 is provided at one side of the top of the closed top cover 4, and a feed hole 402 is provided at a position where the closed top cover 4 is fixedly connected to the feed slide pipe 11. As shown, neatly arranged stirring rods 601 are provided at the bottom of the stirring frame 6, stirring blades 12 are fixedly connected to the surface of the stirring rods 601, and a rotation limit block 13 is provided at the top of the stirring rod 601.

[0029] In the present embodiment, by providing a stirring frame 6, a stirring rod 601, and a stirring blade 12, it is beneficial for the first motor 5 to drive the stirring frame 6 to rotate when the preheated cement raw material enters the interior of the calcining furnace main body 1, so that the stirring frame 6 drives the stirring rod 601 and the stirring blade 12 to rotate to fully stir the cement raw material, thereby preventing incomplete calcination of the cement raw material. At the same time, the preheated cement raw material can avoid temperature fluctuations inside the calcining furnace main body 1, improve the stability of the internal temperature, and thus improve the quality of the cement clinker.

[0030] Reference Figure 4 As shown, neatly arranged feeding holes 602 are provided at the top of the stirring frame 6 , a connecting shaft 603 is provided at the top of the stirring frame 6 , and neatly arranged self-rotation slots 604 are provided at the bottom of the stirring frame 6 .

[0031] In the present embodiment, the feeding hole 602 and the self-rotating hole groove 604 are provided, so that when the preheated cement raw meal enters the interior of the calcining furnace body 1, the raw meal can reach the bottom position of the calcining furnace body 1 through the feeding hole 602, and the stirring rod 601 can rotate while stirring the cement raw meal through the self-rotating hole groove 604, thereby improving the flexibility of the cement raw meal stirring and improving the uniformity of the heating of the cement raw meal during calcination.

[0032] Reference Figure 6 As shown, a dust storage chamber 801 is opened inside the dust storage box 8, a filter screen plate 14 is fixedly connected to the inside of the dust storage chamber 801, a circular through hole 15 is opened in the dust storage box 8 at the position connected to the waste heat guide pipe 10, a connecting pipe 16 is fixedly connected to the surface of the dust storage box 8 on one side close to the calcining furnace body 1, and the end of the connecting pipe 16 away from the dust storage box 8 is movably sleeved on one side of the top of the closed top cover 4.

[0033] In this embodiment, by providing a dust storage box 8 and a filter screen 14, it is helpful to block harmful particles and dust in the exhaust gas generated during cement calcination, preventing dust from entering the air with the exhaust gas and causing harm to the surrounding air and workers.

[0034] Reference Figure 7 As shown, an insulation box 17 is movably sleeved inside the preheating insulation shell 9 and near the bottom end, an exhaust pipe 19 is movably sleeved inside the insulation box 17 and near the top end, the exhaust pipe 19 is fixedly sleeved on the side of the preheating insulation shell 9 away from the calcining furnace body 1 and near the bottom, an insulation cover 20 is movably sleeved at the top of the preheating insulation shell 9, a second motor 21 is fixedly connected to the top of the insulation cover 20, a stirring shaft 22 is transmission-connected to the bottom of the second motor 21, the stirring shaft 22 is movably sleeved in the internal position of the heat conducting plate 18, and a second support plate 27 is fixedly connected to the surface of the side of the insulation cover 20 away from the calcining furnace body 1.

[0035] In this embodiment: by providing a preheating and heat-insulating shell 9, an insulating cover 20, a second motor 21, and a stirring shaft 22, it is beneficial to fully recover the heat energy of waste heat; and by utilizing the preheating and heat-insulating shell 9 and the insulating cover 20, the heat loss is reduced, and at the same time, the stirring shaft 22 is driven by the second motor 21 to evenly preheat the cement raw material.

[0036] Reference Figure 7 As shown, a first support plate 23 is fixedly connected to a surface position on one side of the preheating and insulation shell 9 away from the calcining furnace body 1, a third motor 24 is fixedly connected to the bottom position of the first support plate 23, limiting rods 25 are fixedly connected to both sides of the top of the first support plate 23, a threaded rod 26 is movably sleeved on the top of the first support plate 23 and located at a middle position adjacent to the first support plate 23, the threaded rod 26 is transmission-connected to the third motor 24, and the limiting rod 25 and the threaded rod 26 are movably sleeved in an internal position of the second support plate 27.

[0037] In this embodiment: through the first support plate 23, the second support plate 27, the limit rod 25 and the threaded rod 26, when calcination work is required, the third motor 24 drives the threaded rod 26 limited by the limit rod 25 to rotate, so that the threaded rod 26 drives the second support plate 27 and the insulation cover 20 to rise, so that the cement raw material inside the preheating insulation shell 9 is driven to the position of the feed slide pipe 11, so that the cement raw material enters the calcining furnace body 1 for calcination.

[0038] The working principle of the present invention is as follows: first, when in use, the cement raw material to be calcined is placed in the internal position of the preheating insulation shell 9, and then the third motor 24 is turned on so that the third motor 24 drives the threaded rod 26 to rotate, and then the threaded rod 26 rotates and is limited by the limit rod 25 so that the second support plate 27 drives the insulation cover 20 to descend, and then the insulation cover 20 seals and stores the cement raw material in the internal position of the preheating insulation shell 9, and then the fuel placement port 3 opened on one side of the combustion seat furnace 2 is opened to add fuel, and then the combustion seat furnace 2 heats the inside of the calcining furnace body 1. When the inside of the calcining furnace body 1 reaches the preset temperature, the hot air discharged from the inside of the calcining furnace body 1 is sealed and heated. The exhaust hole 401 opened in the top cover 4 enters the interior of the connecting pipe 16, and then the hot air enters the interior of the dust storage box 8 through the connecting pipe 16, and then the high-temperature hot air is guided to the interior of the insulation box 17 inside the preheating insulation shell 9 through the waste heat guide pipes 10 on both sides of the dust storage box 8, and then the heat is conducted through the heat conduction plate 18 to preheat the cement raw material on the top, and at the same time, the second motor 21 is turned on so that the second motor 21 drives the stirring shaft 22 to rotate, so that the cement raw material inside the preheating insulation shell 9 is heated more evenly, and then the excess hot air is discharged through the exhaust pipe 19. When the interior of the calcining furnace body 1 meets the calcining temperature, the third motor 24 is turned on at this time so that the threaded rod 26 rotates to drive the second The support plate 27 and the heat insulation cover 20 are lifted, and the heat insulation cover 20 drives the second motor 21 and the stirring shaft 22 to drive, and then the stirring shaft 22 drives the heat conduction plate 18 to lift, and the raw material on the top of the heat conduction plate 18 is driven to the position of the feed slide 11, and then the raw material enters the top position of the stirring frame 6 inside the calcining furnace body 1 through the feed slide 11, and then the first motor 5 is turned on so that the first motor 5 drives the connecting shaft 603 to rotate, and then the connecting shaft 603 rotates to drive the stirring frame 6 to rotate as a whole, and then the preheated raw material enters the internal position of the calcining furnace body 1 through the discharge hole 602. When the raw material enters, the new raw material is put into the preheating and holding furnace in the above manner. The interior of the preheating shell 9 is made to allow the insulation cover 20 to seal the top of the preheating and heat-insulating shell 9, and then the rotation of the stirring frame 6 drives the stirring rod 601 to rotate, so that the stirring rod 601 and the stirring blade 12 can evenly stir the calcined raw material, and at the same time, through the connection between the self-rotation limit block 13 and the stirring frame 6, the stirring rod 601 can rotate to rotate and fully stir the raw material, and then the exhaust gas and dust generated during the calcination enter the dust storage chamber 801, and then the dust particles are filtered through the filter plate 14, and the generated exhaust gas enters the insulation box 17 inside the preheating and heat-insulating shell 9 in the above manner, and then the new cement raw material inside the preheating and heat-insulating shell 9 is preheated.

[0039] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A calcining device for cement production, comprising a calcining furnace body (1), characterized in that: A combustion seat furnace (2) is fixedly sleeved on the surface of the calcining furnace body (1) and near the bottom, a fuel placement port (3) is provided on one side of the surface of the combustion seat furnace (2), a closed top cover (4) is movably sleeved on the top of the calcining furnace body (1), a first motor (5) is fixedly connected to the top of the closed top cover (4), a stirring frame (6) is movably connected inside the calcining furnace body (1) and at the bottom of the closed top cover (4), support frame plates (7) are fixedly connected on both sides of the surface of the calcining furnace body (1) and near the top, and the calcining furnace body (1) is provided with a plurality of support plates (7) on the bottom of the closed top cover (4). A dust storage box (8) is fixedly connected to the top position of a support frame plate (7) on one side of the body (1); a preheating insulation shell (9) is fixedly connected to the top position of a support frame plate (7) on the other side of the calcining furnace body (1); waste heat guide pipes (10) are fixedly connected to the surfaces of the dust storage box (8) and the preheating insulation shell (9) at positions near the bottom on both sides; a feed slide pipe (11) is provided on the surface of the preheating insulation shell (9) at a position close to one side of the calcining furnace body (1); and the feed slide pipe (11) is fixedly connected to an internal position of the top of the closed top cover (4) close to one side of the preheating insulation shell (9).

2. A cement production calcining device according to claim 1, characterized in that: An exhaust hole (401) is provided at one side of the top of the closed top cover (4), a feed hole (402) is provided at a position where the closed top cover (4) is fixedly connected to the feed slide pipe (11), neatly arranged stirring rods (601) are provided at the bottom of the stirring frame (6), stirring blades (12) are fixedly connected to the surface of the stirring rods (601), and a self-rotation limit block (13) is provided at the top of the stirring rods (601).

3. A cement production calcining device according to claim 1, characterized in that: The top of the stirring frame (6) is provided with neatly arranged feeding holes (602), the top of the stirring frame (6) is provided with a connecting shaft (603), and the bottom of the stirring frame (6) is provided with neatly arranged self-rotating hole grooves (604).

4. A cement production calcining device according to claim 1, characterized in that: A dust storage chamber (801) is provided inside the dust storage box (8), a filter screen (14) is fixedly connected to a position inside the dust storage chamber (801), a circular through hole (15) is provided in the dust storage box (8) at a position connected to the waste heat guide pipe (10), a connecting pipe (16) is fixedly connected to a surface position of a side of the dust storage box (8) close to the calcining furnace body (1), and an end of the connecting pipe (16) away from the dust storage box (8) is movably sleeved on a position on a side of the top of the closed top cover (4).

5. A cement production calcining device according to claim 1, characterized in that: An insulation box (17) is movably sleeved inside the preheating insulation shell (9) and near the bottom end, an exhaust pipe (19) is movably sleeved inside the insulation box (17) and near the top end, an exhaust pipe (19) is fixedly sleeved on a side of the preheating insulation shell (9) away from the calcining furnace body (1) and near the bottom, an insulation cover (20) is movably sleeved on the top end of the preheating insulation shell (9), a second motor (21) is fixedly connected to the top end of the insulation cover (20), a stirring shaft (22) is drivingly connected to the bottom end of the second motor (21), the stirring shaft (22) is movably sleeved on the inside end of the heat conducting plate (18), and a second support plate (27) is fixedly connected to the surface end of the insulation cover (20) away from the calcining furnace body (1).

6. A cement production calcining device according to claim 5, characterized in that: A first support plate (23) is fixedly connected to a surface position of a side of the preheating and heat-insulating shell (9) away from the calcining furnace body (1); a third motor (24) is fixedly connected to the bottom position of the first support plate (23); limiting rods (25) are fixedly connected to both sides of the top of the first support plate (23); a threaded rod (26) is movably sleeved at the top of the first support plate (23) and located adjacent to the middle of the first support plate (23); the threaded rod (26) is transmission-connected to the third motor (24); and the limiting rod (25) and the threaded rod (26) are both movably sleeved at an inner position of the second support plate (27).

Images