Continuous rotary kiln

Abstract

The utility model discloses a continuous rotary kiln, which comprises a support frame, a rotary furnace, a feeding end and a discharging end, and further comprises a feeding pipe, a discharging pipe, a rotary shaft, a plurality of rotary shafts and a plurality of rotary shafts, one end of the feeding pipe is rotationally connected with the feeding end, the other end of the feeding pipe is connected to the bottom of the feeding pipe, the feeding pipe is obliquely arranged, and the end, close to the feeding pipe, of the feeding pipe is higher than the other end of the feeding pipe; and the heating mechanism is arranged on the feeding pipe and is used for heating the materials. The utility model has the following advantages and effects: the preheating temperature rise section is arranged in front, so that the heating efficiency is improved, and a sufficient temperature control area is reserved for the subsequent cooling section.

Description

Technical Field

[0001] The utility model relates to the field of rotary kilns, in particular to a continuous rotary kiln. Background Art

[0002] Rotary kiln is a kind of equipment that treats solid materials at high temperature and is widely used in the fields of new material preparation.

[0003] The rotary kiln in the related art usually includes a support frame and a rotary kiln, one end of the rotary kiln is provided with a feed end and the other end is provided with a discharge end. The material is put into the rotary kiln from the feed end, and the rotary kiln rotates slowly under the drive of the transmission mechanism on the support frame. At this time, the material moves axially in the rotary kiln and is heated by the heating device to achieve the desired heat treatment effect. Subsequently, the material is discharged from the discharge end.

[0004] The rotary kiln in the related technology usually heats the material in a continuous operation, that is, the material is continuously fed into the rotary kiln through the feed end, thereby realizing continuous heating of the material. By setting different heating sections in the rotary kiln, assuming that the length from the feed end to the discharge end of the rotary kiln is 8 meters, it can be divided into: preheating section (first 2m, such as room temperature to 200°C), high temperature reaction section (middle 3m, 300-600°C), cooling section (latter 3m, 100-300°C), each temperature section is equipped with an independent temperature sensor and temperature controller to achieve zoned temperature control. When synthesizing all-solid-state perovskite quantum dots, our company found that precise control of the cooling section helps the recrystallization of the product and improves the product quality.

[0005] Therefore, how to increase the control of the cooling section (i.e., increase the length of the cooling section) without replacing the continuous rotary kiln equipment is a problem to be solved. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a continuous rotary kiln, which improves the heating efficiency by placing the preheating stage in front, thereby leaving enough temperature control area for the subsequent cooling stage.

[0007] The above technical purpose of the utility model is achieved through the following technical solutions: a continuous rotary kiln, including a support frame, a rotary furnace, a feeding end and a discharging end, the continuous rotary kiln also includes:

[0008] The feeding pipe is arranged vertically and fixed on the supporting frame;

[0009] A feed pipe, one end of which is rotatably connected to the feed end and the other end of which is connected to the bottom of the feed pipe, the feed pipe is arranged in an inclined shape, and one end of the feed pipe close to the feed pipe is higher than the other end;

[0010] The heating mechanism is arranged on the feeding pipe and is used for heating the material.

[0011] In a preferred example, the utility model can be further configured as follows: the heating mechanism includes:

[0012] A heating wire is wound around the feeding pipe and connected to an external power source;

[0013] A controller is fixed on the feeding pipe, the controller is connected to the heating wire, and is used to control the heating temperature of the heating wire.

[0014] In a preferred example, the utility model can be further configured as follows: a mounting bracket is provided at the top end of the feeding pipe, a feeding shaft is coaxially provided inside the feeding pipe, the top end of the feeding shaft is rotatably connected to the mounting bracket, and a control member for controlling the rotation of the feeding shaft is provided on the mounting bracket, and a spiral feeding blade is fixedly connected to the feeding shaft to realize spiral feeding of the material.

[0015] In a preferred example, the utility model can be further configured as follows: the control component includes a control motor and a reducer fixed on the mounting frame, the output shaft of the control motor is coaxially fixedly connected to the input shaft of the reducer, and the output shaft of the reducer is coaxially fixedly connected to the feeding shaft.

[0016] In a preferred example, the utility model can be further configured as follows: the mounting frame is detachably connected to the feeding pipe, so that the feeding shaft and the feeding blade can be taken out from the feeding pipe.

[0017] In summary, the utility model has the following beneficial effects:

[0018] 1. The heating mechanism is used to heat the material in the feeding pipe to realize the preheating operation during the material feeding process, reduce the temperature difference between the input material and the material in the rotary kiln, and thus improve the heating efficiency;

[0019] 2. Spiral feeding of materials through spiral feeding blades can not only reduce the risk of material blockage, but also prolong the time the material stays in the feeding pipe, thereby improving the preheating effect of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of Example 1;

[0021] Figure 2 yes Figure 1 Cross-sectional view of the feeding pipe and the feeding pipe;

[0022] Figure 3It is a structural schematic diagram of Example 2.

[0023] Figure numerals: 1. Support frame; 2. Rotary kiln; 3. Feed end; 4. Discharge end; 5. Lifting ring; 6. Feeding pipe; 7. Feeding pipe; 8. Heating mechanism; 81. Heating wire; 82. Controller; 9. Mounting frame; 10. Feeding shaft; 11. Feeding blade; 12. Control part; 121. Control motor; 122. Reducer; 13. Assembly frame; 14. Fastening bolts; 15. Baffle. DETAILED DESCRIPTION

[0024] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0025] Embodiment 1:

[0026] Reference Figure 1 A continuous rotary kiln comprises a support frame 1, a rotary kiln 2 is rotatably connected to the support frame 1, a feed end 3 is arranged at one end of the rotary kiln 2, and a discharge end 4 is arranged at the other end. A plurality of lifting rings 5 ​​are fixedly connected to the support frame 1, so that the rotary kiln can be lifted by an external lifting device.

[0027] The material is put into the rotary kiln 2 from the feed end 3. The rotary kiln 2 rotates slowly under the drive of the transmission mechanism on the support frame 1. At this time, the material moves axially in the rotary kiln 2 and is heated by the heating device in the rotary kiln 2 to achieve the desired heat treatment effect. Subsequently, the material is discharged from the discharge end 4.

[0028] Reference Figure 1 , Figure 2 The continuous rotary kiln further comprises a feeding pipe 6 vertically fixed on the support frame 1, a feeding pipe 7 is fixedly connected to the bottom of the feeding pipe 6, and the feeding pipe 7 is rotatably connected to the feeding end 3 of the rotary kiln 2. At the same time, the feeding pipe 7 is arranged in an inclined shape, and one end of the feeding pipe 7 close to the feeding pipe 6 is higher than the other end, so that the material can smoothly enter the rotary kiln 2.

[0029] Reference Figure 1 , Figure 2 The feeding pipe 6 is provided with a heating mechanism 8, and the heating mechanism 8 is used to preheat the feeding material, that is, during the feeding operation of the material, the material preheating operation can be realized, and the temperature difference between the input material and the material in the rotary kiln 2 can be reduced, thereby improving the heating efficiency. In addition, by pre-arranging the preheating and heating section of the rotary kiln, the heating efficiency is improved, thereby leaving enough temperature control area for the subsequent cooling and temperature reduction section.

[0030] Reference Figure 1 , Figure 2The heating mechanism 8 includes a heating wire 81 wound around the feeding pipe 6, and the heating wire 81 is connected to an external power source. At the same time, a controller 82 is fixedly connected to the feeding pipe 6, and the controller 82 is connected to the heating wire 81 and is used to control the heating temperature of the heating wire 81. Since the heating wire 81 is wound around the feeding pipe 6, the heating effect can be improved so that the material can be heated evenly. At the same time, the temperature of the heating wire 81 is controllable so that the preheating temperature of the material can be adjusted to adapt to the heating requirements of different materials.

[0031] It should be noted that the heating wire 81, the controller 82 and the external power supply are connected in series. This is a prior art and will not be described in detail here. The temperature control and regulation of the heating wire 91 by the controller 82 is also a prior art and will not be described in detail here.

[0032] Reference Figure 1 , Figure 2 , a mounting frame 9 is provided at the top of the feeding pipe 6, a feeding shaft 10 is coaxially provided inside the feeding pipe 6, the top of the feeding shaft 10 is rotatably connected to the mounting frame 9, and a control member 12 for controlling the rotation of the feeding shaft 10 is provided on the mounting frame 9. At the same time, a spiral feeding blade 11 is fixedly connected to the feeding shaft 10, and the end of the feeding blade 11 abuts against the inner wall of the feeding pipe 6 or there is a gap to realize the spiral feeding of the material. When the control member 12 drives the feeding shaft 10 to rotate at a slow speed, the end of the feeding blade 11 and the inner wall of the feeding pipe 6 can adopt a technical solution of abutting. On the contrary, if the speed is fast, a gap can be provided between the end of the feeding blade 11 and the inner wall of the feeding pipe 6 to avoid excessive rotational friction. These are all conventional technical choices of those skilled in the art, and this application should cover the above protection scheme.

[0033] When the material is put into the feeding pipe 6, the feeding shaft 10 is driven by the control part 12 to drive the feeding blade 11 to rotate. At this time, under the action of the feeding blade 11, the material can slowly enter the feeding pipe 7, thereby realizing stable feeding of the material. This design can not only reduce the risk of material blockage, but also prolong the time the material stays in the feeding pipe 6, thereby improving the preheating effect of the material.

[0034] Reference Figure 1 , Figure 2 The control component 12 includes a control motor 121 and a reducer 122 fixed on the mounting frame 9. The output shaft of the control motor 121 is coaxially fixedly connected to the input shaft of the reducer 122. The output shaft of the reducer 122 is coaxially fixedly connected to the feeding shaft 10 to achieve stable rotation of the feeding shaft 10 and the feeding blade 11.

[0035] Reference Figure 1 , Figure 2, the mounting frame 9 is detachably connected to the feeding pipe 6 so that the feeding shaft 10 and the feeding blade 11 can be taken out from the feeding pipe 6. This design can facilitate the staff to repair and replace the feeding blade 11, etc., and improve the convenience of operation. In the present application, the feeding operation of the feeding pipe 6 can be performed by manual feeding, or by sucking external materials into the feeding pipe 6 through a negative pressure device. For example, a negative pressure delivery pipe (not shown in the accompanying drawings) is provided on the mounting frame 9, one end of the negative pressure delivery pipe is connected to the feeding pipe 6, and the other end of the negative pressure delivery pipe is connected to the external silo; a feeding pump is provided on one side of the negative pressure delivery pipe. When the feeding pump is started, the material is transported. Specifically: sucking and conveying materials by a feeding pump is a prior art and will not be repeated here.

[0036] Reference Figure 1 , Figure 2 A pair of assembly frames 13 are symmetrically fixedly connected to the outer wall of the feeding pipe 6, and the two ends of the mounting frame 9 are respectively connected to the corresponding assembly frames 13 by fastening bolts 14 to achieve rapid disassembly and assembly of the mounting frame 9. The top of the feeding pipe 6 is open to increase the guiding effect, so that the material can smoothly enter the feeding pipe 6 to achieve rapid feeding operation.

[0037] Embodiment 2:

[0038] The difference from Example 1 is that:

[0039] like Figure 3 As shown, the feed shaft 10 and the feed blades 11 are both located in the feed pipe 7 , and one end of the feed shaft 10 is detachably fixedly connected to the feed end 3 located in the rotary kiln 2 .

[0040] Furthermore, a baffle 15 is built into the feed end 3 of the rotary kiln 2, and the baffle 15 divides the feed end 3 of the rotary kiln 2 into two separate feed ports. The middle part of the baffle is detachably fixedly connected to one end of the feed shaft 10.

[0041] Since the continuous rotary kiln 2 rotates during operation, the baffle 15 at the feed end thereof will be driven to rotate synchronously, thereby driving the feed shaft 10 and the feed blade 11 located in the feed pipe 7 to rotate, so as to realize automatic feeding. At this time, the material enters the rotary kiln 2 from the separate feed ports on both sides of the baffle 15.

[0042] It should be noted that:

[0043] 1. In this embodiment 2, there is no need to separately set up a driving motor for the preheated materials in the feeding pipe 6 and the feeding pipe 7. The rotation of the original continuous rotary kiln can be used to synchronously drive the preheated materials into the rotary kiln.

[0044] 2. In this embodiment, the feed pipe 7 is stationary, but the feed shaft 10 and the feed blades 11 in the feed pipe 7 will rotate synchronously with the rotary kiln.

[0045] The above-mentioned detachable fixed connection includes, but is not limited to: snap connection, magnetic connection, fastener connection, etc.

[0046] The specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A continuous rotary kiln, comprising a support frame (1), a rotary kiln (2), a feed end (3) and a discharge end (4), characterized in that: The continuous rotary kiln also includes: A feeding pipe (6) is arranged vertically and fixed on the support frame (1); A feed pipe (7), one end of which is rotatably connected to the feed end (3) and the other end of which is connected to the bottom of the feeding pipe (6); the feed pipe (7) is arranged in an inclined shape, and one end of the feed pipe (7) close to the feeding pipe (6) is higher than the other end; The heating mechanism (8) is arranged on the feeding pipe (6) and is used to heat the material.

2. A continuous rotary kiln according to claim 1, characterized in that: The heating mechanism (8) comprises: A heating wire (81) is wound around the feeding pipe (6) and connected to an external power source; A controller (82) is fixed on the feeding pipe (6); the controller (82) is connected to the heating wire (81) and is used to control the heating temperature of the heating wire (81).

3. A continuous rotary kiln according to claim 1, characterized in that: A mounting frame (9) is arranged at the top end of the feeding pipe (6), a feeding shaft (10) is coaxially arranged inside the feeding pipe (6), the top end of the feeding shaft (10) is rotatably connected to the mounting frame (9), and a control member (12) for controlling the rotation of the feeding shaft (10) is arranged on the mounting frame (9), and a spiral feeding blade (11) is fixedly connected to the feeding shaft (10) to realize spiral feeding of materials.

4. A continuous rotary kiln according to claim 3, characterized in that: The control component (12) comprises a control motor (121) and a reducer (122) fixed on the mounting frame (9); the output shaft of the control motor (121) is coaxially fixedly connected to the input shaft of the reducer (122); and the output shaft of the reducer (122) is coaxially fixedly connected to the feeding shaft (10).

5. A continuous rotary kiln according to claim 3, characterized in that: The mounting frame (9) is detachably connected to the feeding pipe (6) so that the feeding shaft (10) and the feeding blade (11) can be taken out of the feeding pipe (6).

6. A continuous rotary kiln according to claim 5, characterized in that: A pair of assembly frames (13) are symmetrically fixedly connected to the outer side wall of the feeding pipe (6), and the two ends of the mounting frame (9) are respectively connected to the corresponding assembly frames (13) by fastening bolts (14).

7. A continuous rotary kiln according to claim 1, characterized in that: The top end of the feeding pipe (6) is arranged in an open shape.

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