Rotary furnace with waste heat recovery function

Abstract

The utility model discloses a rotary furnace with a waste heat recovery function, which belongs to the technical field of rotary furnaces and comprises a support frame, a shaft bracket is fixedly mounted at the upper end of the support frame, a rotary furnace body is arranged at the upper end of the shaft bracket, a driving motor is arranged below the rotary furnace body, and a heat extraction mechanism is arranged on the outer side of the rotary furnace body. According to the rotary furnace with the waste heat recovery function, the heat extraction mechanism is additionally arranged, the heat extraction mechanism adopts a heat flow guiding mode, air is extracted from the outside, heat is taken away by means of an air body, and the effect of rapidly guiding heat flow is achieved; according to the rotary furnace, residual heat in the rotary furnace body can be rapidly guided to an area connected with the butt joint pipeline, the heat recovery effect is achieved, the heat can preheat raw materials about to enter the furnace to be treated, therefore, energy needed during formal heating is reduced, the heat efficiency is improved, and the rotary furnace can also be used for being conveyed to other working procedures needing heat.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary kilns, in particular to a rotary kiln with a waste heat recovery function. Background Technique

[0002] A rotary kiln is a thermal equipment widely used in industrial production, mainly used for calcining, roasting or drying granular and powdery materials. The history of this equipment can be traced back more than a hundred years. It is mainly in large or extra-large structures and is commonly seen in the preliminary processing of powder or mineral materials. In terms of working principle, a rotary kiln usually rotates the furnace body, making the materials roll and turn in the furnace, which can ensure that the materials are in full contact with heat, thus realizing the heat treatment process of the materials. The specific heat treatment process includes three stages: preheating, calcining and cooling. Rotary kilns can be used in a variety of industrial fields, such as the firing of cement clinker, the preparation of titanium dioxide from kaolin, and the processing in the rare earth industry. Although the output of rotary kilns is large, there are some challenges and limitations in the design and operation processes, such as large temperature differences inside the furnace, low temperature control accuracy, difficulty in sealing, and inability to achieve precise atmosphere control.

[0003] When performing the metal rotary forging process, a large amount of heat energy often accumulates inside the furnace body. After the forging operation is completed, this heat energy will slowly and continuously dissipate heat inside the furnace. However, this process is often accompanied by significant waste of heat sources, which not only has an adverse impact on the energy utilization efficiency but also goes against the requirements of energy conservation and emission reduction. Specifically, this heat energy waste phenomenon not only involves the ineffective emission of heat inside the furnace body but may also cause local overheating of the furnace body structure, affecting the stability and service life of the equipment. Content of the Utility Model

[0004] The purpose of the utility model is to provide a rotary kiln with a waste heat recovery function to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A rotary kiln with a waste heat recovery function, including a support frame, an axle frame is fixedly installed at the upper end of the support frame, a rotary furnace body is arranged at the upper end of the axle frame, a driving motor is arranged below the rotary furnace body, a heat extraction mechanism is arranged outside the rotary furnace body, the heat extraction mechanism includes a docking pipeline, a pipeline support, a telescopic pipe, a docking plug, an electric push rod and a first pipeline body. The lower end of the docking pipeline is fixedly installed with a pipeline support, the lower end of the pipeline support is fixedly installed with a telescopic pipe, the end of the telescopic pipe away from the pipeline support is fixedly installed with a docking plug, an electric push rod is fixedly installed on the outer wall of the pipeline support, the transmission end of the electric push rod is fixedly connected with the docking plug, and a first pipeline body is arranged below the docking plug, and the first pipeline body is fixedly installed on the rotary furnace body.

[0006] Optionally, the heat extraction mechanism further includes an extraction fan, a second duct body, a first guiding fan, a third duct body, a second guiding fan, a fixing ring body, a telescopic air rod, a displacement mounting ring body, a first sealing plate and a second sealing plate, and the extraction fan is installed on the inner wall of the first duct body.

[0007] Optionally, the lower end of the rotary furnace body is fixedly installed with a second duct body and a third duct body, and a fixing ring body is arranged on the right side of the first duct body.

[0008] Optionally, the first guiding fan is installed on the inner wall of the second duct body, and the second guiding fan is installed on the inner wall of the third duct body.

[0009] Optionally, a telescopic air rod is fixedly installed on the fixing ring body, and a displacement mounting ring body is fixedly installed at one end of the telescopic air rod away from the fixing ring body.

[0010] Optionally, the first sealing plate and the second sealing plate are fixedly installed on the inner and outer walls of the displacement mounting ring body. The first sealing plate is in an insertion relationship with the first duct body, and the second sealing plate is in an insertion relationship with the third duct body.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] In the present utility model, a heat extraction mechanism is provided. The heat extraction mechanism adopts a combined design of a heat flow guiding method, an extraction fan and a guiding fan to achieve rapid heat recovery, improve the heat recovery efficiency, effectively recover the residual heat energy in the rotary furnace body, and use it for preheating raw materials or other technological processes, greatly reducing energy consumption and achieving the goal of energy conservation and emission reduction, which is in line with the current environmental protection and sustainable development trends; through the heat flow guiding design of the heat extraction mechanism, the heat in the furnace body can be quickly transmitted to the designated position, improving the heat energy utilization efficiency. This not only reduces the ineffective emission of heat inside the furnace body but also reduces the risk of damage to the furnace body structure caused by local overheating; the heat extraction mechanism reduces the temperature gradient inside the furnace body by precisely controlling the movement of the heat flow, thereby reducing the internal stress of the furnace body structure and enhancing the stability and service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the present utility model in a three-dimensional front view;

[0014] Figure 2 is a schematic structural diagram of the present utility model in a planar front view;

[0015] Figure 3 is a schematic structural diagram of the present utility model in a three-dimensional top view;

[0016] Figure 4 is a schematic structural diagram of the present utility model in a three-dimensional rear view;

[0017] Figure 5 Structural schematic of the three-dimensional section of the present utility model Figure 1 ;

[0018] Figure 6 Structural schematic of the three-dimensional section of the present utility model Figure 2 。

[0019] In the figure: 1, support frame; 2, rotary furnace body; 3, shaft frame; 4, drive motor; 5, heat extraction mechanism; 501, docking pipeline; 502, pipe rack; 503, telescopic pipe; 504, docking plug block; 505, electric push rod; 506, first pipe body; 507, extraction fan; 508, second pipe body; 509, first guide fan; 510, third pipe body; 511, second guide fan; 512, fixed ring body; 513, telescopic air rod; 514, displacement mounting ring body; 515, first sealing plate; 516, second sealing plate. Specific embodiments

[0020] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0021] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to Figures 1 to 6 , in the embodiment of the present invention, a rotary furnace with waste heat recovery function includes a support frame 1. A shaft frame 3 is fixedly installed at the upper end of the support frame 1. A rotary furnace body 2 is arranged at the upper end of the shaft frame 3. A driving motor 4 is arranged below the rotary furnace body 2. A heat extraction mechanism 5 is arranged outside the rotary furnace body 2. The heat extraction mechanism 5 includes a docking pipe 501, a pipe rack 502, a telescopic pipe 503, a docking plug 504, an electric push rod 505 and a first pipe body 506. The lower end of the docking pipe 501 is fixedly installed with the pipe rack 502. The lower end of the pipe rack 502 is fixedly installed with the telescopic pipe 503. One end of the telescopic pipe 503 away from the pipe rack 502 is fixedly installed with the docking plug 504. The electric push rod 505 is fixedly installed on the outer wall of the pipe rack 502. The transmission end of the electric push rod 505 is fixedly connected with the docking plug 504. A first pipe body 506 is arranged below the docking plug 504. The first pipe body 506 is fixedly installed on the rotary furnace body 2. The heat extraction mechanism 5 further includes a suction fan 507, a second pipe body 508, a first guide fan 509, a third pipe body 510, a second guide fan 511, a fixed ring body 512, a telescopic air rod 513, a displacement installation ring body 514, a first sealing plate 515 and a second sealing plate 516. The suction fan 507 is installed on the inner wall of the first pipe body 506. The second pipe body 508 and the third pipe body 510 are fixedly installed at the lower end of the rotary furnace body 2. A fixed ring body 512 is arranged on the right side of the first pipe body 506. The first guide fan 509 is installed on the inner wall of the second pipe body 508. The second guide fan 511 is installed on the inner wall of the third pipe body 510. The telescopic air rod 513 is fixedly installed on the fixed ring body 512. One end of the telescopic air rod 513 away from the fixed ring body 512 is fixedly installed with the displacement installation ring body 514. The first sealing plate 515 and the second sealing plate 516 are fixedly installed on the inner and outer walls of the displacement installation ring body 514. The first sealing plate 515 is in an inserted connection relationship with the first pipe body 506. The second sealing plate 516 is in an inserted connection relationship with the third pipe body 510;

[0024] The telescopic air rod 513 realizes the movement of the displacement mounting ring body 514 through telescopic action, thereby controlling the action of the sealing plate and ensuring the smooth progress of the heat recovery operation. The displacement mounting ring body 514 connects and fixes the sealing plate, making the sealing and opening / closing actions of the pipeline body during the heat recovery process more precise and reliable; the electric push rod 505 controls the precise movement of the telescopic pipe 503 and the docking plug 504 to ensure tight docking with the first pipeline body 506 and avoid heat energy loss. The docking pipeline 501 serves as a channel for heat transfer; the telescopic pipe 503 and the docking plug 504 are used in cooperation to achieve docking with the first pipeline body 506. The first pipeline body 506 receives the hot air extracted from the rotary furnace body 2 and guides it to the subsequent heat exchange system, which is a key part for realizing heat recovery. The exhaust fan 507 sucks the hot air from the rotary furnace body 2, and the first guiding fan 509 and the second guiding fan 511 send air into the rotary furnace body 2 from the outside to increase the heat exchange efficiency and optimize the heat distribution through the guiding air duct. The second pipeline body 508 and the third pipeline body 510 serve as transmission channels for the outside air.

[0025] The working principle of the present utility model is as follows: The rotary furnace with waste heat recovery function is additionally provided with a heat extraction mechanism 5. Before using the rotary furnace with waste heat recovery function, it is necessary to pre-connect the driving motor 4, electric push rod 505, extraction fan 507, first guiding fan 509, second guiding fan 511 and telescopic air rod 513 to electricity and connect them to the control terminal. When using the rotary furnace with waste heat recovery function, start the driving motor 4 to drive the rotary furnace body 2 to rotate for basic heat processing operations. After the heat processing operation is completed, start the heat extraction mechanism 5 for heat recovery operations. First, start the telescopic air rod 513 to push the displacement mounting ring body 514 from right to left, and drive the first sealing plate 515 and the second sealing plate 516 on the displacement mounting ring body 514 to disengage from the pipe body (the first pipe body 506, the second pipe body 508 and the third pipe body 510), so that the pipe body is no longer sealed. At this time, the electric push rod 505 pushes the telescopic pipe 503 and the docking plug 504 downward, so that the docking plug 504 is tightly docked with the first pipe body 506. At this time, the extraction fan 507, the first guiding fan 509 and the second guiding fan 511 are started. The first guiding fan 509 and the second guiding fan 511 send air into the rotary furnace body 2 from the outside. The extraction fan 507 then transmits the hot air in the rotary furnace body 2 into the docking pipe 501 and transmits it to the designated position through the docking pipe 501. The extraction fan 507, the first guiding fan 509 and the second guiding fan 511 form a diversion air duct, which can achieve the effect of efficiently replacing the heat in the rotary furnace body 2 and realizing the heat recovery effect. To sum up, the heat extraction mechanism 5 adopts the method of guiding the heat flow, extracts air from the outside and uses the air body to carry away the heat, achieving the effect of quickly guiding the heat flow. It can quickly guide the residual heat in the rotary furnace body 2 to the area connected to the docking pipe 501, realizing the heat recovery effect. The heat can preheat the raw materials about to enter the furnace for treatment, thereby reducing the energy required for formal heating, improving the thermal efficiency, and can also be used for other processes that require heat.

[0026] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A rotary furnace with waste heat recovery function, comprising a support frame (1), a shaft frame (3) is fixedly mounted on the upper end of the support frame (1), a rotary furnace body (2) is arranged on the upper end of the shaft frame (3), and a driving motor (4) is arranged below the rotary furnace body (2), characterized in that: A heat extraction mechanism (5) is arranged on the outer side of the rotary furnace body (2), and the heat extraction mechanism (5) comprises a docking pipe (501), a pipe rack (502), a telescopic pipe (503), a docking plug block (504), an electric push rod (505) and a first pipe body (506); the pipe rack (502) is fixedly mounted on the lower end of the docking pipe (501); the telescopic pipe (503) is fixedly mounted on the lower end of the pipe rack (502); the docking plug block (504) is fixedly mounted on the end of the telescopic pipe (503) away from the pipe rack (502); the electric push rod (505) is fixedly mounted on the outer wall of the pipe rack (502); the transmission end of the electric push rod (505) is fixedly connected to the docking plug block (504); the first pipe body (506) is arranged below the docking plug block (504); and the first pipe body (506) is fixedly mounted on the rotary furnace body (2).

2. The rotary kiln with waste heat recovery function according to claim 1, characterized in that: The heat extraction mechanism (5) further comprises an extraction fan (507), a second pipe body (508), a first air guide fan (509), a third pipe body (510), a second air guide fan (511), a fixed ring body (512), a telescopic gas rod (513), a displacement mounting ring body (514), a first sealing plate (515) and a second sealing plate (516); the extraction fan (507) is mounted on the inner wall of the first pipe body (506).

3. The rotary kiln with waste heat recovery function according to claim 1, characterized in that: A second pipe body (508) and a third pipe body (510) are fixedly mounted on the lower end of the rotary furnace body (2), and a fixed ring body (512) is arranged on the right side of the first pipe body (506).

4. The rotary kiln with waste heat recovery function according to claim 3, characterized in that: A first air guide fan (509) is installed on the inner wall of the second duct body (508), and a second air guide fan (511) is installed on the inner wall of the third duct body (510).

5. The rotary kiln with waste heat recovery function according to claim 3, characterized in that: A telescopic gas rod (513) is fixedly mounted on the fixed ring body (512), and a displacement mounting ring body (514) is fixedly mounted on one end of the telescopic gas rod (513) away from the fixed ring body (512).

6. The rotary kiln with waste heat recovery function according to claim 5, characterized in that: A first sealing plate (515) and a second sealing plate (516) are fixedly mounted on the inner and outer walls of the displacement mounting ring body (514); the first sealing plate (515) is plug-connected to the first pipe body (506), and the second sealing plate (516) is plug-connected to the third pipe body (510).

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