A highly efficient and energy-saving automatic hot air rotary furnace

Abstract

The invention discloses an efficient and energy-saving automatic hot air rotary furnace, which relates to the field of rotary furnaces and aims to solve the problem of uneven material reduction in the inner tube of a traditional rotary furnace. The technical scheme includes a barrel body, an outer wall of the barrel body is provided with a placing frame for supporting the barrel body, an end of the barrel body away from the burner is provided with a sealing shell covering the penetration hole, a feeding tube inserted into the inner tube is penetrated in the feeding hole, a ventilation shell connected to the barrel body is provided on the side of the sealing shell away from the inner tube, a material feeding ring plate is provided on the side of the sealing shell away from the inner tube, the material feeding ring plate is fixedly sleeved on the ventilation shell, a feeding ring groove facing the feeding hole is formed between the ventilation shell and the outer wall of the material feeding ring plate, the inner wall of the material feeding ring plate and the inner wall of the feeding tube are tangently arranged, a feeding tube extending into the ventilation shell is provided in communication with the side wall of the raw material box, and a plurality of feeding tubes extending into the feeding ring groove are evenly distributed on the periphery of the end of the outer wall of the feeding tube away from the raw material box. The invention achieves the effect of uniformly feeding materials into multiple inner tubes.

Description

Technical Field

[0001] The invention relates to the technical field of rotary kilns, and in particular to an efficient and energy-saving automatic hot-air rotary kiln. Background Art

[0002] The rotary kiln is a thermal equipment for calcining, roasting or drying granular and powdered materials. As a conventional kiln type, the rotary kiln has existed for hundreds of years, but they are all large or super large, mainly used for primary rough processing of powder or mineral materials, such as the burning and calcination of cement clinker; the preparation of titanium dioxide from kaolin, and the processing of rare earth industry. Although the output is large, there are disadvantages such as large temperature difference, low temperature control accuracy, inability to seal and achieve precise atmosphere control.

[0003] The existing hot air rotary furnace includes a horizontally placed cylindrical barrel body, which is rotatably set on a placement rack. A plurality of inner tubes for placing materials are arranged in the barrel body, and the inner tubes are evenly arranged around the central axis of the barrel body. A burner inserted into the barrel body is arranged at one end in the length direction of the barrel body, and a through hole for inserting the inner tube is opened on the end face of the barrel body away from the burner, and a feed hole facing the inner tube is arranged on the side of the end face in the length direction of the barrel body away from the inner tube. The operator only needs to add materials to the inner tube from the feed hole through the feeding device.

[0004] The above-mentioned prior art solution has the following defects: there are multiple inner tubes evenly distributed in the barrel body, and the amount of material delivered to the inner tube by the feeding device each time will also be different, resulting in a large difference in the material in each inner tube in the barrel body. The heat source supplied by the burner in the barrel body is fixed, so the materials in the multiple inner tubes are heated unevenly. This problem needs to be solved urgently. Summary of the invention

[0005] The purpose of the present invention is to provide an efficient and energy-saving automatic hot air rotary furnace, which has the function of uniformly feeding materials into a plurality of inner tubes.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A highly efficient and energy-saving automatic hot air rotary furnace comprises a barrel body, wherein the outer wall of the barrel body is provided with a placing frame for supporting the barrel body, the placing frame is provided with a driving device for driving the barrel body to rotate, a plurality of inner tubes are evenly distributed in the barrel body, and the plurality of inner tubes are evenly arranged around the central axis of the barrel body, and both ends of the barrel body in the length direction are provided with through holes for the inner tubes to pass through, a sealing shell covering the through holes is provided at one end of the barrel body away from the burner, a feeding hole is provided on one side of the sealing shell away from the burner, a feeding cylinder inserted into the inner tube is passed through the feeding hole, and a ventilation shell connected to the barrel body is provided on one side of the sealing shell away from the inner tube. A feeding ring plate is provided on a side of the sealing shell away from the inner tube, and the feeding ring plate is fixedly sleeved on the ventilation shell, and a feeding ring groove facing the feed hole is formed between the ventilation shell and the outer wall of the feeding ring plate, and the inner wall of the feeding ring plate and the inner wall of the feeding barrel are tangent to each other, and a raw material box is fixedly provided on the end of the placement rack away from the burner, and a feed pipe extending into the ventilation shell is connected to the side wall of the raw material box, and a spiral pushing piece is rotatably provided in the feed pipe, and a plurality of feeding pipes extending into the feed ring groove are evenly distributed on the periphery of the end of the outer wall of the feed pipe away from the raw material box, and the feeding pipes point to the side of the feeding ring plate away from the feed hole.

[0008] By adopting the above technical solution, when the raw material needs to be dried in the barrel, the operator only needs to add the powdered raw material into the raw material box, and the raw material in the raw material box will fall into the feeding pipe. The spiral pusher in the feeding pipe will push the raw material into the feeding pipe, and the feeding pipe will send the raw material to the side of the feeding ring groove away from the barrel. Since the feeding ring plate and the inner wall of the feeding barrel are tangent, the material on the feeding ring plate will directly fall into the feeding barrel. The barrel will rotate on the placement rack under the action of the driving device, and the material on the feeding ring plate will slide inside it. When there is enough material on the feeding ring plate, the material on the feeding ring plate will fall into the feeding barrel. In this process, the material first falls into the feeding ring plate, and then the material with higher material on the feeding ring plate will slide into the feeding barrel during the rotation of the barrel. In this way, the width of the feeding ring plate will form a buffer space. Even if the material in the feeding tube is not fed evenly, it will be compensated by the feeding ring plate. In this way, the raw materials will fall into each inner tube evenly with the rotation of the barrel, the material feed amount in the inner tube is even, and the material in the inner tube will be heated more evenly.

[0009] Furthermore, an annular material baffle plate is arranged at one end of the inner wall of the feeding barrel away from the inner tube, and the material feeding ring plate and the material baffle plate are arranged tangentially.

[0010] By adopting the above technical solution, the baffle plate can increase the height of the inner wall of the feeding barrel, and the feeding ring plate and the baffle plate are tangent. In this way, the material entering the feeding barrel will be blocked by the higher baffle plate, thereby preventing the material in the feeding barrel from flowing backwards.

[0011] Furthermore, a plurality of push plates are provided on the inner side wall of the feeding ring plate, and the push plates point to the side of the feeding ring plate close to the inner tube.

[0012] By adopting the above technical solution, the push plate can push the material in the feeding ring plate to the feeding hole, thereby playing a role in quickly pushing the material in the feeding ring plate into the inner tube.

[0013] Furthermore, the feeding pipe is divided into a feeding section and a discharging section along one side of its feeding direction, and one end of the feeding section away from the raw material box is sealedly connected to a buffer cylinder, and the feeding pipes are evenly distributed around the periphery of the buffer cylinder.

[0014] By adopting the above technical solution, the buffer cylinder can perform preliminary buffering of the material in the feeding pipe, and provide preparation for continuous feeding in the feeding ring plate, thereby further facilitating the uniform feeding of the material in each inner tube.

[0015] Furthermore, the unloading section is fixedly installed on the raw material box, one end of the feeding section is rotatably installed on the unloading section, and the other end is fixedly installed on the end surface of the barrel body; a stabilizing ring is fixedly sleeved on one end of the outer wall of the feeding section close to the unloading section, and a stabilizing wheel that contacts the outer wall of the stabilizing ring is provided on the placement rack.

[0016] By adopting the above technical scheme, the feeding section and the unloading section are rotatably connected, so as to prevent the rotation of the barrel body and the feeding of the feeding pipe from interfering with each other, thereby facilitating the rotation of the feeding pipe without affecting the rotation of the barrel body; the overall span of the feeding section is large, and the mutual cooperation of the stabilizing wheel and the stabilizing ring can provide a fulcrum for the feeding section while it rotates, thereby preventing the feeding section from being deformed, thereby increasing the service life of the feeding section.

[0017] Furthermore, the inner tube is divided along its length direction into a connecting tube inserted in the insertion hole and a heating tube suspended in the barrel body, connecting ring plates are provided at both ends of the length direction of the heating tube, and a fixing ring plate for fixing the connecting ring plate is provided at one end of the connecting tube close to the heating tube.

[0018] By adopting the above technical scheme, since a complete inner tube is directly passed through the holes at both ends of the barrel body, once an inner tube in the barrel body is damaged, the entire barrel body must be disassembled as a whole. The inner tube in this scheme is divided into three sections, the two ends of the inner tube in the length direction are connecting tubes, and the middle position is a heating tube. If the inner tube in the barrel body is damaged, personnel only need to enter the barrel body and then replace the damaged heating tube, thereby facilitating the operator to replace the inner tube in the barrel body.

[0019] Furthermore, a connecting hole is provided on the connecting ring plate, and a fixing hole is provided on the fixing ring plate at a position corresponding to the connecting hole, and connecting bolts are provided in conjunction with the fixing hole and the inner thread of the connecting hole.

[0020] By adopting the above technical solution, when the operator needs to connect the heating pipe and the connecting pipe together, he only needs to align the connecting holes and the fixing holes and then insert the connecting bolts therein, thereby facilitating the connection of the heating pipe and the connecting pipe together.

[0021] In summary, the beneficial technical effects of the present invention are:

[0022] 1. The material feeding ring plate, feeding pipe, feeding pipe and feeding barrel are used to produce the effect of uniformly feeding materials into multiple inner tubes in the barrel;

[0023] 2. The spiral push plate, feeding section and unloading section are used to produce the effect of adding materials into the inner tube;

[0024] 3. Connecting pipes and heating pipes are used to facilitate the inspection of the inner pipes in the barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the cross-sectional structure of the barrel body in the present invention;

[0027] Figure 3 It is a schematic diagram of the partial cross-sectional structure of the barrel body in the present invention;

[0028] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of the middle part A;

[0029] Figure 5 for Figure 3 A schematic diagram of the enlarged structure of the middle B part;

[0030] Figure 6 for Figure 5 The enlarged structural diagram of the middle C part;

[0031] Figure 7 It is a schematic diagram of the structure of the inner tube in the present invention;

[0032] Figure 8 It is a schematic diagram of the cross-sectional structure of the inner tube in the present invention;

[0033] Fig. 9 for Figure 8 Schematic diagram of the enlarged structure of part D in the middle.

[0034] In the figure, 1, barrel; 11, placement rack; 12, driving device; 13, penetration hole; 14, sealing shell; 15, feed hole; 2, feeding barrel; 21, baffle plate; 22, ventilation shell; 23, feeding ring plate; 24, pushing plate; 25, feeding ring groove; 3, inner tube; 31, connecting tube; 32, heating tube; 33, connecting ring plate; 34, fixing ring plate; 35, connecting hole; 36, fixing hole; 37, connecting bolt; 4, burner; 41, raw material box; 42, feeding pipe; 43, unloading section; 44, feeding section; 45, buffer barrel; 46, stabilizing ring; 47, stabilizing wheel; 48, spiral pushing piece; 49, feeding pipe. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0036] Reference Figure 1 and Figure 2 , which is an efficient and energy-saving automatic hot air rotary furnace disclosed by the present invention, includes a placement rack 11 for supporting a barrel body 1, and a driving device 12 for driving the barrel body 1 to rotate is arranged on the placement rack 11, and the barrel body 1 is horizontally and rotatably arranged on the placement rack 11, and a plurality of inner tubes 3 are arranged in the barrel body 1, and the plurality of inner tubes 3 are evenly distributed around the central axis of the barrel body 1, and a feeding device for adding materials into the inner tube 3 is arranged at one end of the placement rack 11 in the length direction of the barrel body 1, and a burner 4 inserted into the barrel body 1 is arranged at the other end of the placement rack 11, and the raw material in the inner tube 3 is powdered particles. In order to facilitate the raw material in the inner tube 3 to slide smoothly from one end of the inner tube 3 to the other end, the barrel body 1 as a whole will have a certain inclination angle.

[0037] Reference Figure 1 and Figure 2 The unloading device includes a raw material box 41 arranged at one end of the placement rack 11 in the length direction. When the operator needs to dry the raw materials in the barrel body 1, he only needs to put the raw materials into the raw material box 41, and the raw material box 41 will transport the raw materials to the inner tube 3, and then rotate the barrel body 1. The material in the inner tube 3 will be dried under the heating of the burner 4, and the dried material can slide out from the other end of the inner tube 3. A cooling device for cooling the material in the inner tube 3 is provided at one end of the barrel body 1 close to the burner 4. The cooling device includes a collecting shell for collecting the material, and the cooled material finally falls into the container through the collecting shell.

[0038] Reference Figure 2 and Figure 3A hole 13 is provided on one end face of the barrel body 1 in the length direction for inserting the inner tube 3. A feed pipe 42 for conveying raw materials into the inner tube 3 is penetrated in the raw material box 41. A spiral push piece 48 for conveying the raw materials into the inner tube 3 is provided in the feed pipe 42. Since the barrel body 1 itself rotates, in order to prevent the rotation of the barrel body 1 from interfering with the stability of the feed pipe 42, the feed pipe 42 is divided into a discharge section 43 and a feeding section 44. The discharge section 43 is connected to the raw material box 41, and the feeding section 44 is connected to the barrel body 1, and the connection between the feeding section 44 and the discharge section 43 is rotationally connected.

[0039] Reference Figure 3 and Figure 4 , a sealing shell 14 covering the penetration hole 13 is provided on one end face of the barrel body 1 in the length direction, a feeding hole 15 is opened on the sealing shell 14, a feeding tube 2 is penetrated in the feeding hole 15, and the end of the feeding tube 2 close to the barrel body 1 is penetrated in the inner tube 3, and a ventilation shell 22 connected to the barrel body 1 is provided on the end face of the sealing shell 14 away from the barrel body 1, the ventilation shell 22 is in the shape of a ring and penetrated in the barrel body 1, and a material feeding ring plate 23 sleeved on the ventilation shell 22 is provided on the end face of the barrel body 1, and a feeding ring groove 25 for raw materials to fall into is formed between the material feeding ring plate 23 and the ventilation shell 22; the end of the feeding section 44 away from the unloading section 43 is connected to a feeding pipe 49 inserted into the feeding ring groove 25, and the end of the feeding pipe 49 inserted into the material feeding ring groove is away from the barrel body 1 The position is set, the feeding ring plate 23 and the inner wall of the feeding barrel 2 are set tangently. In order to prevent the material in the feeding barrel 2 from flowing out in the opposite direction, an annular baffle plate 21 is set at the end of the feeding barrel 2 away from the barrel body 1. In order to facilitate the adjustment of the feeding ring plate 23 to be tangent to the baffle plate 21, and in order to facilitate the material in the feeding ring plate 23 to enter the feeding hole 15, a plurality of push plates 24 are set in the feeding ring plate 23, pointing to the side of the feeding ring plate 23 close to the inner tube 3.

[0040] Reference Figure 3 and Figure 4 After the operator adds the powdered raw material into the raw material box 41, the raw material will enter the unloading section 43, and the spiral push piece 48 will push the raw material into the feeding tube 49 through the feeding section 44. In the feeding tube 49, as the barrel body 1 rotates, the feeding tube 49 will spit the raw material into the feeding ring groove 25. The raw material will first accumulate on the side of the feeding ring plate 23 away from the barrel body 1. After the barrel body 1 rotates, the higher material will flow to the feeding barrel 2. Due to the gravity of the material, it will be accumulated on the position of the feeding ring plate 23 close to the ground. Since the material is accumulated first and then slides into the feeding barrel 2, even if the material in the feeding tube 42 is not fed in time, the material previously accumulated in the feeding ring plate 23 will continue to fall into the feeding barrel 2. In this way, the continuity and stability of the feeding of the inner tube 3 can be guaranteed, thereby playing a role of uniformly feeding the inner tube 3.

[0041] Reference Figure 4 , Figure 5 and Figure 6 The overall span of the feeding section 44 is relatively large. Due to the effective stiffness of the material itself, the end of the large span may cause the feeding section 44 to bend. In order to reduce the span of the feeding section 44, a stabilizing ring 46 is sleeved on one end of the feeding section 44 close to the unloading section 43, and a stabilizing wheel 47 cooperating with the stabilizing ring 46 is provided on the placement frame 11, which plays a role in framing the rotating feeding section 44, thereby preventing the feeding section 44 from bending; in order to further improve the continuity of the feeding of the inner tube 3, a buffer cylinder is sleeved on the end of the feeding section 44 away from the unloading section 43, and the feeding pipes 49 are evenly distributed on the periphery of the side wall of the buffer cylinder 45.

[0042] Reference Figure 4 and Figure 7 Both end surfaces of the barrel body 1 in the length direction are provided with through holes 13 for the inner tube 3 to pass through. The inner tube 3 is divided into a connecting tube 31 and a heating tube 32 along its length direction. The connecting tube 31 is passed through the through hole 13, and the heating tube 32 is arranged in the barrel body 1 for heating. In this way, when the heating tube 32 that has been heated for a long time is damaged, the operator only needs to enter the barrel body 1 and then replace the heating tube 32 in the barrel body 1.

[0043] Reference Figure 8 and Fig. 9 Connecting ring plates 33 are provided at both ends of the heating tube 32 in the length direction, and a fixing ring plate 34 that fits the connecting ring plate 33 is provided at one end of the connecting tube 31 close to the heating tube 32. The connecting ring plate 33 and the fixing ring plate 34 are finally fixed together by connecting bolts 37; a connecting hole 35 is provided on the connecting ring plate 33, and a fixing hole 36 is provided on the fixing ring plate 34. The connecting bolts 37 are threadedly fitted in the connecting hole 35 and the fixing hole 36.

[0044] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An efficient and energy-saving automatic hot air rotary furnace, comprising a barrel (1), the outer wall of the barrel (1) is provided with a placing frame (11) for supporting the barrel (1), the placing frame (11) is provided with a driving device (12) for driving the barrel (1) to rotate, a plurality of inner tubes (3) are evenly distributed in the barrel (1), the plurality of inner tubes (3) are evenly arranged around the central axis of the barrel (1), and the barrel (1) is provided with a through hole (13) at both ends in the length direction for the inner tubes (3) to pass through, characterized in that: A sealing shell (14) covering the penetration hole (13) is provided at one end of the barrel body (1) away from the burner (4); a feed hole (15) is provided on one side of the sealing shell (14) away from the burner (4); a feeding tube (2) inserted into the inner tube (3) is penetrated in the feed hole (15); a ventilation shell (22) connected to the barrel body (1) is provided on one side of the sealing shell (14) away from the inner tube (3); a material feeding ring plate (23) is provided on one side of the sealing shell (14) away from the inner tube (3); the material feeding ring plate (23) is fixedly sleeved on the ventilation shell (22); and a space directly facing the feed hole is formed between the outer side walls of the ventilation shell (22) and the material feeding ring plate (23). The feeding annular groove (25) of the material hole (15), the inner side wall of the material feeding annular plate (23) and the inner side wall of the feeding barrel (2) are arranged tangent to each other, a raw material box (41) is fixedly arranged at one end of the placement rack (11) away from the burner (4), a feeding pipe (42) extending into the ventilation shell (22) is connected to the side wall of the raw material box (41), a spiral pushing piece (48) is rotatably arranged in the feeding pipe (42), and a plurality of feeding pipes (49) extending into the feeding annular groove (25) are evenly distributed on the periphery of one end of the outer side wall of the feeding pipe (42) away from the raw material box (41), and the feeding pipes (49) point to the side of the material feeding annular plate (23) away from the feeding hole (15); The feeding pipe (42) is divided into a feeding section (43) and a feeding section (44) along one side of the feeding direction; the feeding section (44) is sealedly connected to a buffer cylinder (45) at one end away from the raw material box (41); and the feeding pipes (49) are evenly distributed on the periphery of the buffer cylinder (45); The unloading section (43) is fixedly installed on the raw material box (41); one end of the feeding section (44) is rotatably installed on the unloading section (43), and the other end is fixedly installed on the end surface of the barrel body (1); a stabilizing ring (46) is fixedly sleeved on one end of the outer wall of the feeding section (44) close to the unloading section (43), and a stabilizing wheel (47) is provided on the placement frame (11) to abut against the outer wall of the stabilizing ring (46).

2. The high-efficiency and energy-saving automatic hot air rotary furnace according to claim 1, characterized in that: An annular material baffle plate (21) is provided at one end of the inner side wall of the feeding cylinder (2) away from the inner tube (3), and the material-feeding ring plate (23) and the material baffle plate (21) are arranged tangentially.

3. The high-efficiency and energy-saving automatic hot air rotary furnace according to claim 2, characterized in that: A plurality of push plates (24) are arranged on the inner side wall of the material feeding ring plate (23), and the push plates (24) point to the side of the material feeding ring plate (23) close to the inner tube (3).

4. The high-efficiency and energy-saving automatic hot air rotary furnace according to claim 3, characterized in that: The inner tube (3) is divided along its length direction into a connecting tube (31) inserted into the insertion hole (13) and a heating tube (32) suspended in the barrel (1); connecting ring plates (33) are provided at both ends of the heating tube (32) in the length direction; and a fixing ring plate (34) for fixing the connecting ring plate (33) is provided at one end of the connecting tube (31) close to the heating tube (32).

5. The high-efficiency and energy-saving automatic hot air rotary furnace according to claim 4, characterized in that: The connecting ring plate (33) is provided with a connecting hole (35), the fixing ring plate (34) is provided with a fixing hole (36) at a position corresponding to the connecting hole (35), and the fixing hole (36) and the connecting hole (35) are internally threadedly matched with connecting bolts (37).

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