Energy-saving rotary kiln with heat recycling function

Abstract

The utility model relates to the technical field of ceramic pigment production, and discloses an energy-saving rotary kiln with a heat recycling function, which comprises a rotary kiln body and a feeding bin, a driven gear is rotatably mounted on the outer wall of the feeding bin, a rotary drum penetrates through the axis of the driven gear, and a drainage mechanism is arranged in the rotary drum. According to the energy-saving rotary kiln with the heat recycling function, a drainage mechanism is arranged, hot air circulating in an inner cavity of the rotary drum flows through a drainage plate and moves towards an inner cavity of the heating drum under the guidance of a triangular plate and an arc-shaped groove, and it is guaranteed that the temperature in the heating drum is in a high state through air exchange; under the guidance of the arc strips and the notch grooves, the exchange speed of air in the heating cylinder and hot air in the rotating cylinder is increased, so that the temperature of the heating cylinder is better guaranteed, the materials are fully preheated when the rotating cylinder drives the heating cylinder to rotate, and the waste heat recovery efficiency of the whole device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ceramic pigment production, in particular to an energy-saving rotary kiln with a heat recovery and utilization function. Background Art

[0002] Ceramic pigment is a kind of pigment used for surface decoration of ceramic objects. It is generally divided into overglaze pigment, underglaze pigment and in-glaze pigment according to the method of use. In the production of ceramic pigment, some materials usually need to be calcined. In this process, in order to ensure that the materials are fully calcined and heated evenly, a rotary kiln is usually used. However, during the calcination process, the gas discharged from the rotary kiln usually takes away part of the heat, causing heat energy loss in the rotary kiln. Therefore, an energy-saving rotary kiln with heat recovery function is needed.

[0003] According to a disclosed energy-saving rotary kiln with heat recovery function (publication number: CN216694435U), in the above application, the negative pressure fan transports the high-temperature flue gas to the inner cavity of the drum through the air inlet pipe, and the output shaft of the driving motor drives the drum to rotate through the driving gear and the driven gear to preheat the material, thereby reducing the heat energy loss during direct discharge and improving the heat energy utilization efficiency of the rotary kiln.

[0004] However, during the actual use of the above equipment, the heating efficiency of the materials in the feed bin is poor. When the motor-driven rotating drum rotates and drives the heating drum to turn the materials, the heat in the rotating drum and the heating drum will exchange heat with the materials. Due to the lack of sufficient airflow diversion effect between the heating drum and the rotating drum, the hot air flow circulating in the rotating drum cannot be exchanged with the heating drum in time under the action of the wind force of the fan. As a result, with the increase of use time, the heat exchange (material preheating) efficiency of the heating drum will continue to decline, reducing the use efficiency of the device. In view of this, we propose an energy-saving rotary kiln with heat recovery function. Utility Model Content

[0005] The purpose of the utility model is to provide an energy-saving rotary kiln with a heat recovery function to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an energy-saving rotary kiln with heat recovery and utilization function, comprising a rotary kiln body and a charging bin, a mounting frame is passed through the end of the rotary kiln body, and the mounting frame is rotatably connected to the rotary kiln body, a stepper motor is fixedly installed on the bottom side wall of the mounting frame, and a driving wheel is fixedly connected to the output end of the stepper motor, a feeding pipe is fixedly installed between the bottom end of the charging bin and the end of the rotary kiln body, a feeding port is opened at the top of the charging bin, an exhaust gas processor is fixedly installed on the side wall of the charging bin, a mounting plate is fixedly installed on the outer wall of the charging bin, a driving motor is fixedly installed on the outer wall of the mounting plate, a driving gear is fixedly connected to the output end of the driving motor, a driven gear is rotatably installed on the outer wall of the charging bin, a rotating drum is passed through the axis of the driven gear, and the rotating drum is fixedly connected to the driven gear, a conduit is rotatably connected to the axis of the driven gear, a drainage mechanism is arranged inside the rotating drum, and the drainage mechanism comprises:

[0007] A heating cylinder, wherein a ventilation groove is provided on the arc-shaped outer wall of the rotating cylinder, a heating cylinder is fixedly installed on the inner surface of the ventilation groove, a fixing rod is rotatably installed on the inner wall of the heating cylinder, a guide plate is passed through the fixing rod, and the guide plate is rotatably connected to the fixing rod, and a volute spring is sleeved on the arc-shaped outer wall of the fixing rod;

[0008] A triangular plate, a triangular plate is fixedly mounted on the outer wall of one side of the guide plate close to the driven gear, and an arc groove is provided at the connection between the triangular plate and the guide plate;

[0009] The arc bar is fixedly mounted on the side wall of the triangular plate, and a notch groove is opened on the arc-shaped outer wall of the arc bar.

[0010] Preferably, a fixed disc is provided at the end of the rotary kiln body, and vertical plates are provided at the left and right ends of the mounting frame respectively, and the fixed disc and the vertical plates are fixedly connected to ensure that the rotary kiln body can be stably mounted on the mounting frame, a transmission ring is provided on the arc-shaped outer wall of the rotary kiln body, and a square groove matched with the above-mentioned transmission ring is provided on the bottom upper surface of the mounting frame, and the transmission ring is arranged inside the above-mentioned square groove, and the transmission ring and the square groove are respectively provided in three groups, and the three groups of transmission rings and square grooves are respectively arranged in the middle part and the left and right ends of the rotary kiln body.

[0011] Preferably, the guide plate is arranged in an "L" shape, and the triangular plate is arranged at the notch of the guide plate, with the tip of the triangular plate facing the side of the driven gear to better guide and transmit the exhaust gas flowing through the guide plate and the triangular plate.

[0012] Preferably, one end of the arc strip is arranged in the internal cavity of the heating cylinder, and the other end of the arc strip is arranged in the internal cavity of the rotating cylinder, so as to facilitate guiding the air flow circulating in the rotating cylinder into the heating cylinder, so as to enhance the exchange effect between the air in the heating cylinder and the air in the rotating cylinder.

[0013] Preferably, a limiting chute is provided on the top inner wall of the guide plate, a steel ball is arranged in the limiting chute, and the limiting chute is kept parallel to the top outer wall of the guide plate.

[0014] Preferably, slide grooves matching the spherical surface of the steel balls are provided on the inner surfaces of the left and right sides of the limiting chute, so that the steel balls can roll freely in the limiting chute.

[0015] Compared with the prior art, the utility model provides an energy-saving rotary kiln with heat recovery and utilization function, which has the following beneficial effects:

[0016] 1. The energy-saving rotary kiln with heat recovery and utilization function is provided with a drainage mechanism. The hot air circulating in the internal cavity of the rotating drum flows through the drainage plate and moves toward the internal cavity of the heating cylinder under the guidance of the triangular plate and the arc groove. The temperature in the heating cylinder is kept at a high state through the exchange of air. Under the guidance of the arc strip and the notch groove, the exchange rate between the air in the heating cylinder and the hot air in the rotating drum is increased to better ensure the temperature of the heating cylinder. When the rotating drum drives the heating cylinder to rotate, the production materials of the ceramic pigment in the feeding bin are fully preheated, thereby improving the overall waste heat recovery efficiency of the device.

[0017] 2. The energy-saving rotary kiln with heat recovery function has a limited chute and steel balls on the inner wall of the top of the guide plate, and cooperates with the scroll spring to reset the guide plate. Due to the uncertainty of the movement of the steel balls, the rotation of the guide plate is also affected by the movement inertia of the steel balls, thereby effectively improving the guide plate's drainage effect on the exhaust gas in the drum, thereby ensuring the air exchange efficiency of the heating cylinder, and then ensuring that the temperature of the heating cylinder can continuously preheat the production materials of ceramic pigments in the feeding bin. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the charging bin of the utility model;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the end of the rotary drum of the utility model;

[0021] Figure 4 This is a schematic diagram of the three-dimensional structure of the drainage plate of the utility model when viewed from below;

[0022] Figure 5 It is a schematic diagram of the partial cross-sectional structure of the top of the guide plate of the utility model.

[0023] In the figure: 1. rotary kiln body; 2. mounting frame; 3. stepping motor; 4. driving wheel; 5. feeding bin; 6. feeding pipe; 7. feeding port; 8. exhaust gas processor; 9. mounting plate; 10. driving motor; 11. driving gear; 12. driven gear; 13. rotating drum; 14. conduit; 15. heating drum; 16. fixing rod; 17. guide plate; 18. scroll spring; 19. triangular plate; 20. arc groove; 21. arc strip; 22. notch groove; 23. limit chute; 24. steel ball. DETAILED DESCRIPTION

[0024] like Figure 1-Figure 5 As shown, the utility model provides a technical solution: an energy-saving rotary kiln with heat recovery and utilization function, comprising a rotary kiln body 1 and a charging bin 5, the end of the rotary kiln body 1 is penetrated by a mounting frame 2, and the mounting frame 2 is rotatably connected to the rotary kiln body 1, a stepper motor 3 is fixedly installed on the bottom side wall of the mounting frame 2, and a driving wheel 4 is fixedly connected to the output end of the stepper motor 3, a feeding pipe 6 is fixedly installed between the bottom end of the charging bin 5 and the end of the rotary kiln body 1, a feeding port 7 is opened at the top of the charging bin 5, an exhaust gas processor 8 is fixedly installed on the side wall of the charging bin 5, and the outer wall of the charging bin 5 is fixedly connected to the charging port 7. A mounting plate 9 is fixedly installed, a driving motor 10 is fixedly installed on the outer wall of the mounting plate 9, a driving gear 11 is fixedly connected to the output end of the driving motor 10, a driven gear 12 is rotatably installed on the outer wall of the feeding bin 5, a rotating drum 13 passes through the axis of the driven gear 12, and the rotating drum 13 is fixedly connected to the driven gear 12, a conduit 14 is rotatably connected to the axis of the driven gear 12, a drainage mechanism is arranged inside the rotating drum 13, and the drainage mechanism includes a heating cylinder 15, a fixing rod 16, a drainage plate 17, a scroll spring 18, a triangular plate 19, an arc groove 20, an arc bar 21 and a notch groove 22.

[0025] In an embodiment of the utility model, a ventilation groove is provided on the arc-shaped outer wall of the rotating drum 13, a heating tube 15 is fixedly installed on the inner surface of the ventilation groove, a fixing rod 16 is rotatably installed on the inner wall of the heating tube 15, a guide plate 17 is passed through the fixing rod 16, and the guide plate 17 is rotatably connected to the fixing rod 16, a spiral spring 18 is sleeved on the arc-shaped outer wall of the fixing rod 16, a triangular plate 19 is fixedly installed on the outer wall of the guide plate 17 on the side close to the driven gear 12, an arc-shaped groove 20 is provided at the connecting portion between the triangular plate 19 and the guide plate 17, an arc strip 21 is fixedly installed on the side wall of the triangular plate 19, and a notch groove 22 is provided on the arc-shaped outer wall of the arc strip 21.

[0026] In one embodiment of the utility model, a fixed disc is provided at the end of the rotary kiln body 1, and vertical plates are provided at the left and right ends of the mounting frame 2, respectively. Specifically, the fixed disc and the vertical plates are fixedly connected to ensure that the rotary kiln body 1 can be stably mounted on the mounting frame 2. At the same time, a transmission ring is provided on the arc-shaped outer wall of the rotary kiln body 1, and a square groove matching the transmission ring is provided on the bottom upper surface of the mounting frame 2, and the transmission ring is provided inside the square groove, and three groups of transmission rings and square grooves are provided respectively, and the three groups of transmission rings and square grooves are provided. The grooves are respectively arranged at the middle and left and right ends of the rotary kiln body 1. Specifically, the stepping motor 3 is arranged on the side wall of the square groove located in the middle of the rotary kiln body 1, and the driving wheel 4 is tightly abutted against the arc-shaped outer surface of the transmission ring, so that when the stepping motor 3 is started, the driving wheel 4 is cooperated to drive the rotary kiln body 1 to rotate on the mounting frame 2. Further, the feeding bin 5 is arranged on one side of the rotary kiln body 1, and one end of the two ends of the guide tube 14 away from the driven gear 12 is fixedly connected to the top of the fixed disc arranged at the end of the rotary kiln body 1 through an air pump, so that the inside of the rotary kiln body 1 The cavity can be connected to the inner cavity of the drum 13 through the conduit 14. Specifically, the exhaust gas inside the rotary kiln body 1 can be discharged to the inside of the drum 13 through the conduit 14. In addition, the exhaust gas processor 8 is arranged on the side of the feeding bin 5 away from the driven gear 12, and the drum 13 is connected to the input end of the exhaust gas processor 8, so that the exhaust gas discharged from the drum 13 will eventually enter the exhaust gas processor 8, and after being purified by the exhaust gas processor 8, it will eventually be discharged to the outside. At the same time, the driven gear 12 is meshed with the driving gear 11 to realize transmission, so that when the drive motor 1 is started, the exhaust gas can be discharged to the outside. 0, cooperate with the driving gear 11 to make the driven gear 12 and the rotating drum 13 start to rotate. Specifically, the number of heating cylinders 15 is set to multiple groups, and the multiple groups of heating cylinders 15 are evenly distributed on the arc-shaped outer wall of the rotating drum 13 in a circular array, so that with the rotation of the rotating drum 13, the production materials of the ceramic pigment in the charging bin 5 are stirred, and the exhaust gas discharged inside and outside the rotary kiln body 1 flowing in the rotating drum 13 and the heating cylinders 15 is cooperated to realize the preheating of the material in the charging bin 5, improve the thermal energy utilization rate of the rotary kiln body 1 during use, reduce resource waste, and achieve the effect of energy saving and emission reduction.

[0027] In addition, the interior of the heating cylinder 15 is hollow, and the width of the guide plate 17 matches the width of the internal cavity of the heating cylinder 15. At the same time, the guide plate 17 is "L"-shaped, and the triangular plate 19 is arranged at the notch of the guide plate 17. Specifically, the tip of the triangular plate 19 faces the side of the driven gear 12, that is, the direction in which the exhaust gas in the rotary kiln body 1 flows into the rotating cylinder 13, so as to better guide and transmit the exhaust gas flowing through the guide plate 17 and the triangular plate 19, so that it enters the arc groove 20 along the two sides of the triangular plate 19. Specifically, there are two groups of arc grooves 20, and the two groups of arc grooves 20 are opened on the left and right sides of the guide plate 17, so as to guide the exhaust gas flowing through the arc groove 20, so that it flows along the inner surface of the arc groove 20 toward the internal cavity of the heating cylinder 15. Furthermore, one end of the arc strip 21 is arranged in the internal cavity of the heating cylinder 15, and the other end of the arc strip 21 is arranged in the internal cavity of the rotating cylinder 13, so as to facilitate the rotation. The airflow circulating in the cylinder 13 is guided into the heating cylinder 15 to enhance the exchange effect between the air in the heating cylinder 15 and the air in the rotating cylinder 13, thereby ensuring that the temperature in the heating cylinder 15 is in a relatively high state, so that the heating cylinder 15 can better preheat the material when stirring the material. In addition, a circular groove with a diameter larger than the outer diameter of the spiral spring 18 is provided on the inner wall of the heating cylinder 15, and the two ends of the spiral spring 18 are respectively fixedly connected to the arc-shaped outer wall of the fixing rod 16 and the bottom inner surface of the above-mentioned circular groove, so that the spiral spring 18 can drive the guide plate 17 to reset when the guide plate 17 rotates with the fixing rod 16 as the rotation axis, so that the guide plate 17 will be deflected to a certain extent under the drive of the airflow in the rotating cylinder 13, and then under the action of the spiral spring 18, the guide plate 17 will continue to deflect slightly in the heating cylinder 15 to enhance the exchange effect of the guide plate 17 on the air in the heating cylinder 15, thereby improving the heat exchange efficiency of the equipment.

[0028] In the embodiment of the utility model, a limiting chute 23 is provided on the top inner wall of the guide plate 17, and a steel ball 24 is arranged in the limiting chute 23. Specifically, the limiting chute 23 is parallel to the top outer wall of the guide plate 17. Specifically, the limiting chute 23 is horizontally arranged, and the inner surfaces on the left and right sides of the limiting chute 23 are provided with chutes matching the spherical surface of the steel ball 24, so that the steel ball 24 can roll freely in the limiting chute 23, and cooperate with the volute spring 18 to reset the guide plate 17. Due to the uncertainty of the movement of the steel ball 24, the rotation of the guide plate 17 is also affected by the movement inertia of the steel ball 24, thereby effectively improving the guide plate 17 The drainage effect of the exhaust gas in the rotating drum 13 is improved, thereby ensuring the air exchange efficiency of the heating drum 15, and then ensuring that the temperature of the heating drum 15 can continuously preheat the material in the feeding bin 5.

[0029] In the utility model, when in use, the stepper motor 3 is started, and the driving wheel 4 is cooperated to make the rotary kiln body 1 rotate continuously on the mounting frame 2, and at this time, the raw material of the ceramic pigment is put into the feeding port 7 of the feeding bin 5, and the driving motor 10 is started at the same time, so that the air pump draws the exhaust gas extracted from the rotary kiln body 1 from the conduit 14 and transports it to the rotating drum 13, and then driven by the rotating drum 13, the heating cylinder 15 stirs the material in the feeding bin 5, and preheats the raw material for the production of the ceramic pigment through the temperature exchange between the rotating drum 13 and the heating cylinder 15, and finally the preheated material enters the rotary kiln body 1 through the feeding pipe 6 for continuous operation, at the same time, through the provision of a drainage mechanism, the hot air circulating in the internal cavity of the rotating drum 13 flows through the drainage plate 17, and under the guidance of the triangular plate 19 and the arc groove 20, moves toward the internal cavity of the heating cylinder 15, and passes Through the exchange of air, the temperature in the heating cylinder 15 is ensured to be at a high state, and under the guidance of the arc strip 21 and the notch groove 22, the exchange rate between the air in the heating cylinder 15 and the hot air in the rotating cylinder 13 is increased to better ensure the temperature of the heating cylinder 15, and then when the rotating cylinder 13 drives the heating cylinder 15 to rotate, the material is fully preheated, and the overall waste heat recovery efficiency of the device is improved. In addition, by providing a limited chute 23 and a steel ball 24 on the inner wall of the top end of the guide plate 17, and cooperating with the resetting effect of the guide plate 17 by the volute spring 18, the movement of the steel ball 24 is uncertain, and the rotation of the guide plate 17 is also affected by the movement inertia of the steel ball 24, thereby effectively improving the guide effect of the guide plate 17 on the exhaust gas in the rotating cylinder 13, thereby ensuring the air exchange efficiency of the heating cylinder 15, and then ensuring that the temperature of the heating cylinder 15 can continuously preheat the material in the feeding bin 5.

[0030] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. An energy-saving rotary kiln with a heat recovery function, comprising a rotary kiln body (1) and a charging bin (5), wherein a mounting frame (2) penetrates through the end of the rotary kiln body (1), and the mounting frame (2) is rotatably connected to the rotary kiln body (1), a stepper motor (3) is fixedly mounted on the bottom side wall of the mounting frame (2), and a driving wheel (4) is fixedly connected to the output end of the stepper motor (3), a feeding pipe (6) is fixedly mounted between the bottom end of the charging bin (5) and the end of the rotary kiln body (1), and a feeding port (7) is provided at the top of the charging bin (5), and the An exhaust gas processor (8) is fixedly mounted on the side wall of the feeding bin (5), a mounting plate (9) is fixedly mounted on the outer wall of the feeding bin (5), a driving motor (10) is fixedly mounted on the outer wall of the mounting plate (9), an output end of the driving motor (10) is fixedly connected to a driving gear (11), a driven gear (12) is rotatably mounted on the outer wall of the feeding bin (5), a rotating drum (13) passes through the axis of the driven gear (12), and the rotating drum (13) is fixedly connected to the driven gear (12), and a conduit (14) is rotatably connected to the axis of the driven gear (12), Features: A drainage mechanism is provided inside the rotating drum (13), and the drainage mechanism comprises: A heating cylinder (15), wherein a ventilation groove is provided on the arc-shaped outer wall of the rotating cylinder (13), the heating cylinder (15) is fixedly mounted on the inner surface of the ventilation groove, a fixing rod (16) is rotatably mounted on the inner wall of the heating cylinder (15), a guide plate (17) passes through the fixing rod (16), and the guide plate (17) is rotatably connected to the fixing rod (16), and a spiral spring (18) is sleeved on the arc-shaped outer wall of the fixing rod (16); A triangular plate (19), wherein the triangular plate (19) is fixedly mounted on the outer wall of one side of the guide plate (17) close to the driven gear (12), and an arc groove (20) is provided at the connection portion between the triangular plate (19) and the guide plate (17); The arc strip (21) is fixedly mounted on the side wall of the triangular plate (19), and a notch groove (22) is provided on the arc-shaped outer wall of the arc strip (21).

2. An energy-saving rotary kiln with heat recovery function according to claim 1, Features: The end of the rotary kiln body (1) is provided with a fixed disc, and the left and right ends of the mounting frame (2) are respectively provided with vertical plates, the fixed disc and the vertical plates are fixedly connected, a transmission ring is provided on the arc-shaped outer wall of the rotary kiln body (1), and the bottom upper surface of the mounting frame (2) is provided with a square groove matched with the transmission ring, and the transmission ring is arranged inside the square groove, and the transmission ring and the square groove are respectively provided in three groups, and the three groups of transmission rings and square grooves are respectively arranged in the middle part and the left and right ends of the rotary kiln body (1).

3. The energy-saving rotary kiln with heat recovery function according to claim 1, Features: The guide plate (17) is arranged in an "L" shape, and the triangular plate (19) is arranged at the notch of the guide plate (17), with the tip of the triangular plate (19) facing the side of the driven gear (12).

4. The energy-saving rotary kiln with heat recovery function according to claim 1, Features: One end of the arc strip (21) is arranged in the internal cavity of the heating cylinder (15), and the other end of the arc strip (21) is arranged in the internal cavity of the rotating cylinder (13).

5. The energy-saving rotary kiln with heat recovery function according to claim 1, Features: A limiting chute (23) is provided on the top inner wall of the guide plate (17), a steel ball (24) is arranged in the limiting chute (23), and the limiting chute (23) is kept parallel to the top outer wall of the guide plate (17).

6. An energy-saving rotary kiln with heat recovery function according to claim 5, Features: The inner surfaces on the left and right sides of the limit chute (23) are provided with chute grooves matching the spherical surface of the steel ball (24).

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