Method and device for reducing firing heat consumption by using coal gangue

Abstract

The invention discloses a method and a device for reducing firing heat consumption by using coal gangue, and relates to the technical field of cement production, the device for reducing firing heat consumption comprises a base, a kiln head seat, a kiln tail seat, a rotary kiln, a driving motor and a feeding mechanism, the kiln head seat is fixedly connected with the base, the kiln tail seat is fixedly connected with the base, and the feeding mechanism is fixedly connected with the rotary kiln. The kiln head seat and the kiln tail seat are sequentially arranged at the two ends of the rotary kiln in the material conveying direction, the driving motor is fixedly connected with the base, the output end of the driving motor is in transmission connection with the rotary kiln, the rotary kiln is rotationally connected with the base, the two ends of the rotary kiln are rotationally connected with the kiln head seat and the kiln tail seat respectively, and the feeding mechanism is fixedly connected with the kiln head seat. The feeding mechanism is used for feeding coal gangue into the rotary kiln.

Description

Technical Field

[0001] The invention relates to the technical field of cement production, in particular to a method and a device for reducing heat consumption during calcination by using coal gangue. Background Art

[0002] With the continuous development of the global economy, the construction industry's demand for cement and other building materials continues to grow. Traditional cement production mainly relies on silicon-aluminum raw materials, but the mining and processing of these raw materials not only consumes a lot of natural resources, but may also cause damage to the environment. At the same time, the large amount of coal gangue generated during coal mining not only occupies land resources, but also may cause environmental pollution and ecological problems. Therefore, seeking effective ways to utilize coal gangue has become a problem that needs to be solved urgently. As an industrial waste, coal gangue contains a certain amount of silicon, aluminum and other elements in its composition, which are dependent on the main components of cement clinker. Therefore, converting coal gangue into raw materials for cement clinker through technical means can not only solve the problem of coal gangue accumulation, but also realize the recycling of resources, reduce production costs, and reduce dependence on new resources.

[0003] The main components of coal gangue are similar to clay, and it can replace clay as a silicon-alumina material. Since there is a small amount of heat in coal gangue, if the amount of coal gangue can be reasonably controlled and the thermal system of the kiln system can be stabilized, it can also effectively reduce the heat consumption of firing and save production costs.

[0004] However, the sizes of coal gangue particles are different. If coal gangue particles of different sizes are added into the rotary kiln for firing simultaneously, the time that large coal gangue particles spend in the rotary kiln is not enough to be completely burned, and the combustion efficiency cannot be guaranteed. Summary of the invention

[0005] The object of the present invention is to provide a method and device for reducing the heat consumption of burning by using coal gangue, so as to solve the problems raised in the prior art.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a device for reducing the heat consumption of firing comprises a base, a kiln head base, a kiln tail base, a rotary kiln, a driving motor and a feeding mechanism, the kiln head base is tightly connected to the base, the kiln tail base is tightly connected to the base, the kiln head base and the kiln tail base are sequentially arranged at the two ends of the rotary kiln along the material conveying direction, the driving motor is tightly connected to the base, the output end of the driving motor is transmission-connected to the rotary kiln, the rotary kiln is rotatably connected to the base, the two ends of the rotary kiln are rotatably connected to the kiln head base and the kiln tail base respectively, the feeding mechanism is tightly connected to the kiln head base, and the feeding mechanism is used to feed coal gangue into the rotary kiln.

[0007] The cement raw meal enters the rotary kiln from the kiln head seat for calcination, and during calcination, the coal gangue particles are sent into the rotary kiln through the feeding mechanism to be mixed with the cement raw meal for calcination. Since there is a small amount of heat in the coal gangue, the combustion efficiency in the rotary kiln can be promoted by reasonably controlling the amount of coal gangue added, thereby effectively reducing the heat consumption of burning; the base is fixed to the ground to provide stable support for each mechanism, the kiln head seat and the kiln tail seat at both ends of the rotary kiln are used to provide support for the rotary kiln, and the driving motor is the main power source of the rotary kiln. When the driving motor is started, it drives the rotary kiln to rotate on the base, thereby promoting the mixing of materials in the rotary kiln, and by tilting the rotary kiln at a certain angle, the material will slide from the rotary kiln to the kiln tail seat under the action of its own gravity, thereby completing the calcination.

[0008] Furthermore, the feeding mechanism includes a heating fan, a guide assembly and a feeding assembly. The kiln head seat is provided with a feed port, a smoke exhaust port and a fixed ring. The rotary kiln is rotatably connected to the fixed ring. The heating fan is firmly connected to the outer wall of the kiln head seat. The inlet of the heating fan is connected to the smoke exhaust port. The outlet of the heating fan is connected to the guide assembly. The guide assembly is firmly connected to the fixed ring. The guide assembly is used to separate coal gangue particles of different sizes. The feeding assembly is connected to the guide assembly. The feeding assembly is firmly connected to the fixed ring. The feeding assembly is used to separately feed coal gangue particles of different sizes into the rotary kiln.

[0009] The material enters the rotary kiln from the feed port, and the high-temperature flue gas generated during the calcination of the material is discharged from the exhaust port. The fixed ring is used to connect the kiln head seat and the rotary kiln, and provide an installation basis for the feeding mechanism. The rotary kiln is provided with a corresponding ring groove, which can rotate freely along the fixed ring. The heating fan is used to guide the high-temperature flue gas generated during the calcination process into the guide component, and the heat in the flue gas is reused. The heat in the flue gas is used to preheat the coal gangue entering the guide component to improve the combustion efficiency. The coal gangue particles separated by the guide component are respectively sent into the rotary kiln through the feeding component, so that the moving path of the coal gangue with large particles in the rotary kiln is increased, and the moving path of the coal gangue with small particles in the rotary kiln is shortened, so that the coal gangue of different sizes can be completely burned, thereby improving the combustion efficiency.

[0010] Furthermore, the guide assembly includes a fixed column, a spiral slide, an air supply pipe and a separation box. The fixed column is tightly connected to the fixed ring, the spiral slide is tightly connected to the fixed column, the spiral slide is arranged around the fixed column, the inlet of the spiral slide is externally connected to the coal gangue conveying device, the outlet of the spiral slide is connected to the separation box, the separation box is connected to the feeding assembly, the air supply pipe is tightly connected to the bottom surface of the spiral slide, and the air supply pipe is provided with an air intake duct and an air return duct. The air intake duct is connected to the air outlet end of the heating fan, and the return air duct is connected to the smoke exhaust port.

[0011] The fixed column is fixed on the fixed ring to provide support for the spiral slide. The processed coal gangue particles enter the spiral slide through the corresponding conveying device. The conveying device is a prior art and will not be described in detail here. Under the guidance of the spiral slide, the coal gangue particles will make spiral motion. Under the action of centrifugal force, the coal gangue with large volume and weight will be distributed on the outer circle of the spiral slide, and the coal gangue with small volume and light weight will be distributed on the inner circle of the spiral slide, that is, the coal gangue is automatically separated according to weight. At the same time, the high-temperature flue gas provided by the heating fan enters the air supply pipe under the spiral slide through the air intake pipe to transfer heat to the coal gangue, preheating the coal gangue, and then the high-temperature flue gas is used to return to the exhaust port through the return air pipe.

[0012] Furthermore, a plurality of air outlet holes are provided on the bottom surface of the inner cavity of the spiral slideway, the air outlet holes are connected to the air supply pipe, the air outlet holes are arranged obliquely, and the inclination direction of the air outlet holes is the same as the moving direction of the coal gangue.

[0013] The inclined air outlet holes can guide the high-temperature flue gas into the spiral slide, so that the coal gangue is in direct contact with the high-temperature flue gas, thereby improving the heat exchange efficiency between the two. The impact force of the obliquely flowing high-temperature flue gas makes the coal gangue suspended, thereby reducing the friction during the movement process, which can increase the movement speed of the coal gangue in the spiral slide, thereby improving the separation effect of the coal gangue.

[0014] Furthermore, a first outlet and a second outlet are provided on the separation box, the first outlet is close to the inner circle of the spiral slideway outlet, the second outlet is close to the outer circle of the spiral slideway outlet, and a guide block is provided in the middle of the inner cavity of the separation box.

[0015] The guide block in the middle of the separation box can divide the coal gangue particles flowing out of the spiral slide outlet into two parts. The small particles flow out through the first outlet, and the large particles flow out through the second outlet, thereby realizing automatic separation of coal gangue particles of different sizes.

[0016] Furthermore, the cross section of the guide block is triangular, and the tip of the guide block faces the outlet of the spiral slideway.

[0017] The triangular guide block can reduce the resistance to the gangue particles, thereby improving the smoothness of separation.

[0018] Furthermore, the feeding assembly includes a connecting seat, a first pipe and a second pipe, the connecting seat is tightly connected to the fixing ring, the first pipe is connected to the first outlet, the first pipe is tightly connected to the connecting seat, the second pipe is connected to the second outlet, the second pipe is tightly connected to the connecting seat, a fine material outlet and a coarse material outlet are provided on the connecting seat, the length of the fine material outlet is greater than that of the coarse material outlet, the fine material outlet is connected to the first pipe, and the coarse material outlet is connected to the second pipe.

[0019] The connecting seat is fixed on the fixed ring to provide support for the feeding assembly. Small particles of coal gangue flow into the fine material outlet through the first pipe and are added into the rotary kiln for calcination. Large particles of coal gangue flow into the coarse material outlet through the second pipe and enter the rotary kiln for calcination. Because the length of the fine material outlet is greater than that of the coarse material outlet, the distance that large particles of coal gangue pass through the rotary kiln is longer than that of small particles of coal gangue, so that the combustion time of large particles of coal gangue is correspondingly extended, so that large particles of coal gangue can be completely burned, thereby improving the combustion efficiency of coal gangue.

[0020] Furthermore, a bracket is provided on the base, the rotary kiln is rotatably connected to the bracket, a discharge port and a combustion tube are provided on the kiln tail seat, and a gear ring is provided on the outer ring of the rotary kiln, which is transmission-connected to the output end of the driving motor.

[0021] The bracket is used to provide support for the rotary kiln to prevent the rotary kiln from shifting during rotation. The calcined materials are discharged from the discharge port on the kiln tail seat. The combustion tube is connected to an external fuel source to calcine the materials in the rotary kiln through the combustion of the fuel. The gear ring is used to connect the output end of the drive motor to transmit power to the rotary kiln.

[0022] Further, the method comprises the following steps: S1: Raw materials are added into the rotary kiln from the feed port for calcination; S2: The feeding mechanism feeds the gangue particles into the rotary kiln to mix with the cement raw meal for calcination. The heating fan guides the high-temperature flue gas generated during the calcination process into the guide assembly, and the heat in the flue gas is used to preheat the gangue entering the guide assembly. S3: The separation box divides the gangue particles flowing out of the spiral slide outlet into two parts, so that the gangue particles of different sizes are added into the rotary kiln in batches.

[0023] Compared with the prior art, the present invention has the following beneficial effects: 1. The high-temperature flue gas generated during the calcination process is introduced into the guide assembly 62 through the heating fan 61, and the heat in the flue gas is reused. The heat in the flue gas is used to preheat the coal gangue entering the guide assembly 62, thereby increasing the temperature of the coal gangue entering the rotary kiln to improve the combustion efficiency.

[0024] 2. Under the guidance of the spiral slide 622, the gangue particles will make a spiral motion. Under the action of centrifugal force, the large-volume and heavy-weight gangue will be distributed on the outer circle of the spiral slide 622, and the small-volume and light-weight gangue will be distributed on the inner circle of the spiral slide 622, that is, the gangue is automatically separated according to weight. And because the length of the fine material outlet 6311 is greater than that of the coarse material outlet 6312, the large-particle gangue travels a longer distance in the rotary kiln 4 than the small-particle gangue, so that the combustion time of the large-particle gangue is correspondingly extended, so that the large-particle gangue can be completely burned, thereby improving the combustion efficiency of the gangue.

[0025] 3. The inclined air outlet 6221 can guide the high-temperature flue gas into the spiral slide 622, so that the coal gangue is in direct contact with the high-temperature flue gas, thereby improving the heat exchange efficiency between the two. The impact force of the inclined high-temperature flue gas makes the coal gangue suspended, thereby reducing the friction during the movement, which can increase the movement speed of the coal gangue in the spiral slide 622, thereby improving the separation effect of the coal gangue. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a partial cross-sectional view of the present invention; Figure 3 It is a schematic diagram of the feeding mechanism of the present invention; Figure 4 A schematic diagram of the guide assembly; Figure 5 for Figure 4 A local enlarged view of point A; Figure 6 A partial cross-sectional view of a guide assembly; Figure 7 for Figure 6 A partial enlarged view of point B; Figure 8 is a cross-sectional view of a separation box; Fig. 9 A partial cross-sectional view of the feeding assembly.

[0027] In the figure: 1-base, 11-bracket, 2-kiln head seat, 21-feeding port, 22-smoke exhaust port, 23-fixing ring, 3-kiln tail seat, 31-discharge port, 32-combustion tube, 4-rotary kiln, 41-gear ring, 5-drive motor, 6-feeding mechanism, 61-heating fan, 62-guide assembly, 621-fixed column, 622-spiral slide, 6221-air outlet, 623-air supply pipe, 6231-air intake pipe, 6232-return air pipe, 624-separation box, 6241-first outlet, 6242-second outlet, 625-guide block, 63-feeding assembly, 631-connecting seat, 6311-fine material outlet, 6312-coarse material outlet, 632-first pipe, 633-second pipe. DETAILED DESCRIPTION

[0028] 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.

[0029] Example: Figure 1-Figure 9 As shown, the present invention provides a method for reducing the heat consumption of firing by using coal gangue and a technical solution of the device thereof. The device for reducing the heat consumption of firing comprises a base 1, a kiln head seat 2, a kiln tail seat 3, a rotary kiln 4, a driving motor 5 and a feeding mechanism 6. The kiln head seat 2 is tightly connected to the base 1, the kiln tail seat 3 is tightly connected to the base 1, the kiln head seat 2 and the kiln tail seat 3 are sequentially arranged at the two ends of the rotary kiln 4 along the conveying direction of the material, the driving motor 5 is tightly connected to the base 1, the output end of the driving motor 5 is transmission-connected to the rotary kiln 4, the rotary kiln 4 is rotationally connected to the base 1, the two ends of the rotary kiln 4 are rotationally connected to the kiln head seat 2 and the kiln tail seat 3 respectively, the feeding mechanism 6 is tightly connected to the kiln head seat 2, and the feeding mechanism 6 is used to feed the coal gangue into the rotary kiln 4.

[0030] The cement raw material enters the rotary kiln 4 from the kiln head seat 2 for calcination, and during calcination, the coal gangue particles are fed into the rotary kiln through the feeding mechanism 6 to be mixed with the cement raw material for calcination. Since there is a small amount of heat in the coal gangue, the combustion efficiency in the rotary kiln 4 can be promoted by reasonably controlling the amount of coal gangue added, thereby effectively reducing the heat consumption of burning; the base 1 is fixed to the ground to provide stable support for each mechanism, the kiln head seat 2 and the kiln tail seat 3 at both ends of the rotary kiln 4 are used to provide support for the rotary kiln 4, and the driving motor 5 is the main power source of the rotary kiln 4. When the driving motor 5 is started, it drives the rotary kiln 4 to rotate on the base 1, thereby promoting the mixing of materials in the rotary kiln 4, and by arranging the rotary kiln 4 at a certain angle, the materials will slide from the rotary kiln 4 to the kiln tail seat 3 under the action of their own gravity, thereby completing the calcination.

[0031] The feeding mechanism 6 includes a heating fan 61, a guide assembly 62 and a feeding assembly 63. The kiln head seat 2 is provided with a feed port 21, a smoke exhaust port 22 and a fixed ring 23. The rotary kiln 4 is rotatably connected to the fixed ring 23. The heating fan 61 is firmly connected to the outer wall of the kiln head seat 2. The inlet of the heating fan 61 is connected to the smoke exhaust port 22. The outlet of the heating fan 61 is connected to the guide assembly 62. The guide assembly 62 is firmly connected to the fixed ring 23. The guide assembly 62 is used to separate coal gangue particles of different sizes. The feeding assembly 63 is connected to the guide assembly 62. The feeding assembly 63 is firmly connected to the fixed ring 23. The feeding assembly 63 is used to feed coal gangue particles of different sizes into the rotary kiln 4 respectively.

[0032] The material enters the rotary kiln 4 from the feed port 21, and the high-temperature flue gas generated during the calcination of the material is discharged from the exhaust port 22. The fixed ring 23 is used to connect the kiln head seat 2 and the rotary kiln 4, and provide an installation basis for the feeding mechanism 6. The rotary kiln 4 is provided with a corresponding annular groove, which can rotate freely along the fixed ring 23. The heating fan 61 is used to guide the high-temperature flue gas generated during the calcination process into the guide component 62, and recycle the heat in the flue gas. The heat in the flue gas is used to preheat the coal gangue entering the guide component 62 to improve the combustion efficiency. The coal gangue particles separated by the guide component 62 are respectively fed into the rotary kiln 4 through the feeding component 63, so that the moving path of the coal gangue with large particles in the rotary kiln 4 is increased, and the moving path of the coal gangue with small particles in the rotary kiln 4 is shortened, so that the coal gangues of different sizes can be completely burned, thereby improving the combustion efficiency.

[0033] The guide assembly 62 includes a fixed column 621, a spiral slide 622, an air supply pipe 623 and a separation box 624. The fixed column 621 is tightly connected to the fixed ring 23, the spiral slide 622 is tightly connected to the fixed column 621, the spiral slide 622 is wound around the fixed column 621, the inlet of the spiral slide 622 is externally connected to the coal gangue conveying device, the outlet of the spiral slide 622 is connected to the separation box 624, the separation box 624 is connected to the feeding assembly 63, the air supply pipe 623 is tightly connected to the bottom surface of the spiral slide 622, and the air supply pipe 623 is provided with an air intake pipe 6231 and an air return pipe 6232, the air intake pipe 6231 is connected to the air outlet end of the heating fan 61, and the return air pipe 6232 is connected to the smoke exhaust port 22.

[0034] The fixed column 621 is fixed on the fixed ring 23 to provide support for the spiral slide 622. The processed coal gangue particles enter the spiral slide 622 through the corresponding conveying device. The conveying device is a prior art and will not be described in detail here. Under the guidance of the spiral slide 622, the coal gangue particles will make spiral motion. Under the action of centrifugal force, the coal gangue with large volume and weight will be distributed on the outer circle of the spiral slide 622, and the coal gangue with small volume and light weight will be distributed on the inner circle of the spiral slide 622, that is, the coal gangue is automatically separated according to weight. At the same time, the high-temperature flue gas provided by the heating fan 61 enters the air supply pipe 623 under the spiral slide 622 through the air intake pipe 6231 to transfer heat to the coal gangue, preheat the coal gangue, and then use the high-temperature flue gas to return to the smoke exhaust port 22 through the return air pipe 6232.

[0035] A plurality of air outlet holes 6221 are provided on the bottom surface of the inner cavity of the spiral slideway 622. The air outlet holes 6221 are connected to the air supply pipe 623. The air outlet holes 6221 are arranged obliquely, and the inclination direction of the air outlet holes 6221 is the same as the moving direction of the coal gangue.

[0036] The inclined air outlet 6221 can guide the high-temperature flue gas into the spiral slide 622, so that the coal gangue is in direct contact with the high-temperature flue gas, thereby improving the heat exchange efficiency between the two. The impact force of the inclined high-temperature flue gas makes the coal gangue suspended, thereby reducing the friction during the movement, which can increase the movement speed of the coal gangue in the spiral slide 622, thereby improving the separation effect of the coal gangue.

[0037] The separation box 624 is provided with a first outlet 6241 and a second outlet 6242 . The first outlet 6241 is close to the inner circle of the outlet of the spiral slideway 622 , and the second outlet 6242 is close to the outer circle of the outlet of the spiral slideway 622 . A guide block 625 is provided in the middle of the inner cavity of the separation box 624 .

[0038] The guide block 625 in the middle of the separation box 624 can divide the coal gangue particles flowing out from the outlet of the spiral slide 622 into two parts. The small particles flow out through the first outlet 6241, and the large particles flow out through the second outlet 6242, thereby realizing automatic separation of coal gangue particles of different sizes.

[0039] The cross section of the guide block 625 is triangular, and the tip of the guide block 625 faces the outlet of the spiral slideway 622 .

[0040] The triangular guide block 625 can reduce the resistance to the coal gangue particles, thereby improving the smoothness of separation.

[0041] The feeding assembly 63 includes a connecting seat 631, a first pipe 632 and a second pipe 633. The connecting seat 631 is tightly connected to the fixing ring 23, the first pipe 632 is communicated with the first outlet 6241, the first pipe 632 is tightly connected to the connecting seat 631, the second pipe 633 is communicated with the second outlet 6242, the second pipe 633 is tightly connected to the connecting seat 631, and a fine material outlet 6311 and a coarse material outlet 6312 are provided on the connecting seat 631. The length of the fine material outlet 6311 is greater than that of the coarse material outlet. The fine material outlet 6311 is communicated with the first pipe 632, and the coarse material outlet 6312 is communicated with the second pipe 633.

[0042] The connecting seat 631 is fixed on the fixed ring 23 to provide support for the feeding assembly 63. Small particles of coal gangue flow into the fine material outlet 6311 through the first pipe 632, and are added to the rotary kiln 4 for calcination. Large particles of coal gangue flow into the coarse material outlet 6312 through the second pipe 633 and enter the rotary kiln 4 for calcination. Because the length of the fine material outlet 6311 is greater than that of the coarse material outlet 6312, the distance that large particles of coal gangue pass through the rotary kiln 4 is longer than that of small particles of coal gangue, so that the combustion time of large particles of coal gangue is correspondingly extended, so that the large particles of coal gangue can be completely burned, thereby improving the combustion efficiency of the coal gangue.

[0043] A bracket 11 is provided on the base 1 , and the rotary kiln 4 is rotatably connected to the bracket 11 . A discharge port 31 and a combustion tube 32 are provided on the kiln tail seat 3 . A gear ring 41 is provided on the outer ring of the rotary kiln 4 , and the gear ring 41 is drivingly connected to the output end of the driving motor 5 .

[0044] The bracket 11 is used to provide support for the rotary kiln 4 to prevent the rotary kiln 4 from shifting during rotation. The calcined materials are discharged from the discharge port 31 on the kiln tail seat 3. The combustion tube 32 is connected to an external fuel source to calcine the materials in the rotary kiln 4 through the combustion of the fuel. The gear ring 41 is used to connect the output end of the drive motor 5, thereby transmitting power to the rotary kiln 4.

[0045] The method comprises the following steps: S1: Raw materials are added into the rotary kiln 4 from the feed port 21 for calcination; S2: The feeding mechanism 6 feeds the gangue particles into the rotary kiln to mix with the cement raw material for calcination, and the heating fan 61 guides the high-temperature flue gas generated during the calcination process into the guide assembly 62, and the heat in the flue gas is used to preheat the gangue entering the guide assembly 62; S3: The separation box 624 divides the coal gangue particles flowing out of the outlet of the spiral slide 622 into two parts, so that the coal gangue particles of different sizes are added into the rotary kiln 4 in batches.

[0046] The working principle of the present invention is as follows: the cement raw material enters the rotary kiln 4 from the kiln head seat 2 for calcination, and during calcination, the coal gangue particles are fed into the rotary kiln through the feeding mechanism 6 to be mixed with the cement raw material for calcination, and the heating fan 61 guides the high-temperature flue gas generated during the calcination process into the guide component 62, and the coal gangue entering the guide component 62 is preheated by the heat in the flue gas. The coal gangue particles will make a spiral motion under the guidance of the spiral slide 622. Under the action of centrifugal force, the coal gangue with large volume and weight will be distributed on the outer circle of the spiral slide 622, and the coal gangue with small volume and light weight will be distributed on the inner circle of the spiral slide 622, that is, the coal gangue is automatically separated according to weight. At the same time, the high-temperature flue gas provided by the heating fan 61 passes through The air inlet pipe 6231 enters the air supply pipe 623 below the spiral slide 622 to transfer heat to the coal gangue to preheat the coal gangue. The guide block 625 in the middle of the separation box 624 can divide the coal gangue particles flowing out from the outlet of the spiral slide 622 into two parts. The particles with small volume flow out through the first outlet 6241, and the particles with large volume flow out through the second outlet 6242. The coal gangue particles of different sizes are automatically separated; the length of the fine material outlet 6311 is greater than the coarse material outlet 6312, that is, the distance that the large particles of coal gangue pass through the rotary kiln 4 is longer than that of the small particles of coal gangue, so that the combustion time of the large particles of coal gangue is correspondingly extended, so that the large particles of coal gangue can be completely burned, thereby improving the combustion efficiency of the coal gangue.

[0047] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A device for reducing heat consumption of burning using coal gangue, characterized in that: The device for reducing the heat consumption of firing comprises a base (1), a kiln head base (2), a kiln tail base (3), a rotary kiln (4), a driving motor (5) and a feeding mechanism (6); the kiln head base (2) is firmly connected to the base (1); the kiln tail base (3) is firmly connected to the base (1); the kiln head base (2) and the kiln tail base (3) are sequentially arranged at two ends of the rotary kiln (4) along the material conveying direction; the driving motor (5) is firmly connected to the base (1); the output end of the driving motor (5) is transmission-connected to the rotary kiln (4); the rotary kiln (4) is rotationally connected to the base (1); the two ends of the rotary kiln (4) are rotationally connected to the kiln head base (2) and the kiln tail base (3) respectively; the feeding mechanism (6) is firmly connected to the kiln head base (2); and the feeding mechanism (6) is used to feed coal gangue into the rotary kiln (4).

2. The device for reducing heat consumption of burning by using coal gangue according to claim 1, characterized in that: The feeding mechanism (6) comprises a heating fan (61), a guide assembly (62) and a feeding assembly (63); the kiln head seat (2) is provided with a feeding port (21), a smoke exhaust port (22) and a fixing ring (23); the rotary kiln (4) is rotatably connected to the fixing ring (23); the heating fan (61) is firmly connected to the outer wall of the kiln head seat (2); the inlet of the heating fan (61) is connected to the smoke exhaust port (22); the outlet of the heating fan (61) is connected to the guide assembly (62); the guide assembly (62) is firmly connected to the fixing ring (23); the guide assembly (62) is used to separate coal gangue particles of different sizes; the feeding assembly (63) is connected to the guide assembly (62); the feeding assembly (63) is firmly connected to the fixing ring (23); the feeding assembly (63) is used to feed the coal gangue particles of different sizes into the rotary kiln (4) respectively.

3. The device for reducing heat consumption of burning by using coal gangue according to claim 2 is characterized in that: The guide assembly (62) comprises a fixed column (621), a spiral slideway (622), an air supply pipe (623) and a separation box (624); the fixed column (621) is tightly connected to the fixed ring (23); the spiral slideway (622) is tightly connected to the fixed column (621); the spiral slideway (622) is arranged around the fixed column (621); the inlet of the spiral slideway (622) is externally connected to a coal gangue conveying device; the spiral slideway (622) ) is communicated with a separation box (624), the separation box (624) is communicated with a feeding assembly (63), the air supply pipe (623) is tightly connected to the bottom surface of the spiral slideway (622), an air intake pipe (6231) and an air return pipe (6232) are provided on the air supply pipe (623), the air intake pipe (6231) is communicated with an air outlet end of a heating fan (61), and the air return pipe (6232) is communicated with a smoke exhaust port (22).

4. The device for reducing heat consumption of burning by using coal gangue according to claim 3 is characterized in that: A plurality of air outlet holes (6221) are provided on the bottom surface of the inner cavity of the spiral slideway (622), the air outlet holes (6221) are in communication with the air supply pipe (623), the air outlet holes (6221) are arranged obliquely, and the inclination direction of the air outlet holes (6221) is the same as the moving direction of the coal gangue.

5. The device for reducing heat consumption of burning by using coal gangue according to claim 4 is characterized in that: The separation box (624) is provided with a first outlet (6241) and a second outlet (6242), wherein the first outlet (6241) is close to the inner ring of the outlet of the spiral slideway (622), and the second outlet (6242) is close to the outer ring of the outlet of the spiral slideway (622), and a guide block (625) is provided in the middle of the inner cavity of the separation box (624).

6. The device for reducing the heat consumption of burning by using coal gangue according to claim 5 is characterized in that: The cross section of the guide block (625) is triangular, and the tip of the guide block (625) faces the outlet of the spiral slideway (622).

7. The device for reducing the heat consumption of burning by using coal gangue according to claim 6 is characterized in that: The feeding assembly (63) comprises a connecting seat (631), a first pipe (632) and a second pipe (633); the connecting seat (631) is tightly connected to the fixing ring (23); the first pipe (632) is in communication with the first outlet (6241); the first pipe (632) is tightly connected to the connecting seat (631); the second pipe (633) is in communication with the second outlet (6242); the second pipe (633) is tightly connected to the connecting seat (631); a fine material outlet (6311) and a coarse material outlet (6312) are provided on the connecting seat (631); the length of the fine material outlet (6311) is greater than that of the coarse material outlet (6312); the fine material outlet (6311) is in communication with the first pipe (632); and the coarse material outlet (6312) is in communication with the second pipe (633).

8. The device for reducing the heat consumption of burning by using coal gangue according to claim 1 is characterized in that: The base (1) is provided with a bracket (11), the rotary kiln (4) is rotatably connected to the bracket (11), the kiln tail seat (3) is provided with a discharge port (31) and a combustion tube (32), the outer ring of the rotary kiln (4) is provided with a gear ring (41), and the gear ring (41) is drivingly connected to the output end of the driving motor (5).

9. The method of using coal gangue to reduce the heat consumption of burning according to claim 8, characterized in that: The method comprises the following steps: S1: raw materials are fed into a rotary kiln (4) from a feed port (21) for calcination; S2: The feeding mechanism (6) feeds the coal gangue particles into the rotary kiln to mix with the cement raw meal for calcination, and the heating fan (61) guides the high-temperature flue gas generated during the calcination process into the guide component (62), and the heat in the flue gas is used to preheat the coal gangue entering the guide component (62); S3: The separation box (624) separates the gangue particles flowing out of the outlet of the spiral slideway (622) into two parts, so that the gangue particles of different sizes are added into the rotary kiln (4) in batches.

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