A stirring device and microwave heating equipment

Abstract

The present invention relates to the field of heating technology, and specifically discloses a stirring device and a microwave heating device, comprising a shell, wherein the interior of the shell has a stirring chamber for placing materials; the stirring device is the stirring device as described above, and one end of the stirring device extends into the stirring chamber. Since the microwave heating device adopts the stirring device, any one of the advantages described in the stirring device is realized, and during the pyrolysis reaction, the material is stirred by the stirring device, which can ensure that the material is heated evenly, improve the pyrolysis effect of the material, further overcome the problem that the pyrolyzed material cannot be recycled, and is conducive to the industrial application and promotion of microwave pyrolysis equipment.

Description

Technical Field

[0001] The invention relates to the technical field of microwave heating, and in particular to a stirring device and microwave heating equipment. Background Art

[0002] The principle of microwave heating technology is: when the medium to be heated is placed in a microwave electromagnetic field, the polar molecules and non-polar molecules in the dielectric material will form dipoles or the existing dipoles will be rearranged. In this process, the molecules will swing at a speed of up to hundreds of millions of times per second with the high-frequency alternating electromagnetic field. During this period, it is necessary to overcome the interference and obstruction of the original thermal motion of the molecules and the interaction between molecules. Therefore, an effect similar to friction will be produced, causing the electromagnetic energy to gradually be converted into thermal energy, causing the temperature of the medium to increase significantly.

[0003] Compared with traditional fossil energy heating technology, microwave heating technology has more uniform heating, lower heat transfer loss, higher heating efficiency, better environmental protection and higher safety. Therefore, the industrial field has gradually begun to apply microwave heating technology. For example, in recent years, microwave pyrolysis furnaces have been gradually used to heat industrial waste salt, industrial tar residue and other media, so that these media can be pyrolyzed and recycled.

[0004] In the process of using microwave pyrolysis equipment to pyrolyze industrial waste salt, industrial tar and other media, the temperature inside the cavity of the pyrolysis furnace increases, and uneven temperature distribution will occur between the materials after the temperature increases, which will cause the materials to become compacted, resulting in low heating efficiency of the materials and very unsatisfactory pyrolysis effects, further leading to the problem that the pyrolyzed materials cannot be recycled, and also limiting the industrial application of microwave pyrolysis furnaces. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects of low material pyrolysis efficiency and poor pyrolysis effect in the prior art, thereby providing a stirring device with high material pyrolysis efficiency and good pyrolysis effect, and a microwave heating device having the stirring device.

[0006] The stirring device of the present invention is arranged in a stirring chamber and comprises a stirring component. One end of the stirring component extends into the material. A plurality of heat dissipation channels are arranged in the stirring component.

[0007] Furthermore, the stirring assembly includes a stirring shaft, and the heat dissipation channel is arranged close to the stirring shaft.

[0008] Furthermore, the stirring assembly also includes a fixed tube on which the stirring shaft is set, and both ends of the stirring shaft extend out of both ends of the fixed tube. The heat dissipation channel is set in the fixed tube along the length direction of the fixed tube, and the outlet and inlet ends of the heat dissipation channel are located outside the upper end of the fixed tube.

[0009] Furthermore, the heat dissipation channel is configured as a U-shaped channel, and two ends of the U-shaped channel are respectively the outlet end and the inlet end.

[0010] Furthermore, the stirring assembly also includes a plurality of connecting shafts detachably connected to the stirring shaft, and a plurality of stirring blades are provided on the connecting shaft. The stirring blades are arranged at intervals on the outer peripheral surface of the connecting shaft and are arranged at a predetermined angle to the connecting shaft.

[0011] Furthermore, a heat preservation pipe is provided inside the fixed pipe or outside the fixed pipe, and the stirring shaft is located inside the heat preservation pipe.

[0012] Furthermore, it also includes a temperature testing component, which includes a temperature sensor. The temperature sensor is arranged inside the stirring shaft along the radial direction of the stirring shaft and / or is arranged on the stirring blade.

[0013] Furthermore, it also includes an auxiliary heat dissipation device, which includes an auxiliary heat dissipation pipe. The auxiliary heat dissipation pipe is sleeved at the connection between the insulation pipe and the stirring chamber. Cooling liquid is transported in the auxiliary heat dissipation pipe to cool the insulation pipe exposed on the stirring chamber.

[0014] The microwave heating device of the present invention comprises

[0015] A shell, wherein the interior of the shell has a stirring chamber for placing materials;

[0016] The stirring device is the stirring device as described above, and one end of the stirring device extends into the stirring chamber.

[0017] Furthermore, at least two stirring devices are provided, and the stirring blades of each stirring device are interlaced.

[0018] The technical solution of the present invention has the following advantages:

[0019] 1. A stirring device provided by the present invention is arranged in a stirring chamber, and includes a stirring component, one end of which extends into the material, and a plurality of heat dissipation channels are arranged in the stirring component. By arranging a plurality of heat dissipation channels in the stirring component and conveying a coolant in the heat dissipation channels, the stirring component is cooled down, and the stirring component after cooling is in a relatively low temperature state. When the stirring component stirs the material, the material can be stirred evenly, so that the material is heated evenly, and the problem of hardening caused by uneven heating of the material during the processing is overcome. Cooling the stirring component can ensure the effectiveness of the stirring component, and the material can also be fully stirred.

[0020] 2. In a stirring device provided by the present invention, the stirring assembly includes a stirring shaft, and the heat dissipation channel is arranged near the stirring shaft. By arranging the heat dissipation channel near the stirring shaft and dissipating the heat of the stirring shaft through the heat dissipation channel, the problem of thermal expansion and contraction of the stirring shaft at high temperature is overcome, and the effect of long-term operation of the stirring shaft under high temperature conditions is achieved without being affected by the high temperature.

[0021] 3. In a stirring device provided by the present invention, the stirring assembly also includes a fixed tube for setting the stirring shaft, the two ends of the stirring shaft extend out of the two ends of the fixed tube, the heat dissipation channel is set inside the fixed tube along the length direction of the fixed tube, and the outlet and inlet ends of the heat dissipation channel are located outside the upper end of the fixed tube. By setting the fixed tube, the stirring shaft is stably fixed, and then the heat dissipation channel is set inside the fixed tube along the length direction of the stirring shaft, which increases the heat dissipation area of ​​the stirring shaft, improves the heat dissipation effect of the stirring shaft, and further avoids the situation where the stirring shaft expands and contracts at high temperatures.

[0022] 4. In a stirring device provided by the present invention, the heat dissipation channel is configured as a U-shaped channel, and the two ends of the U-shaped channel are the outlet end and the inlet end, respectively. The heat dissipation channel is configured as a U-shaped channel, and a coolant can be circulated into the channel to cool the stirring shaft, which is practical.

[0023] 5. A stirring device provided by the present invention further includes a temperature testing assembly, wherein the temperature testing assembly includes a temperature sensor, and the temperature sensor is arranged inside the stirring shaft along the radial direction of the stirring shaft, and / or is arranged on the stirring blade. By arranging the temperature testing assembly, the temperature of the material in the stirring chamber can be detected in real time.

[0024] 6. A stirring device provided by the present invention further includes an auxiliary heat dissipation device, the auxiliary heat dissipation device includes an auxiliary heat dissipation pipe, the auxiliary heat dissipation pipe is sleeved at the connection between the insulation pipe and the stirring chamber, and coolant is transported in the auxiliary heat dissipation pipe to cool the insulation pipe exposed to the stirring chamber. By setting the auxiliary heat dissipation pipe, the connection between the insulation pipe and the stirring chamber is cooled, and after cooling, the temperature of the insulation pipe at the connection and the connection between the bearing seat and the bearing is reduced, which ensures the long-term operation of the stirring bearing in high-temperature equipment and effectively solves the problem of thermal expansion of the bearing in high temperature.

[0025] 7. A microwave heating device provided by the present invention comprises a housing, wherein the housing has a stirring chamber for placing materials; and a stirring device, which is the stirring device described above, and one end of the stirring device extends into the stirring chamber. Since the microwave heating device adopts the stirring device described above, any one of the advantages described above for the stirring device is realized, and during the pyrolysis reaction, the material is stirred by the stirring device, which can ensure that the material is heated evenly, improve the pyrolysis effect of the material, further overcome the problem that the pyrolyzed material cannot be recycled, and is conducive to the industrial application and promotion of microwave pyrolysis equipment.

[0026] 8. In a microwave heating device provided by the present invention, at least two stirring devices are provided, and the stirring blades of each stirring device are interlaced. By providing two or more groups of stirring devices, the stirring and crushing blades between the two groups of stirring devices cooperate with each other, so that the stirring blades that cross each other can stir the medium and crush the agglomerated medium at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A schematic diagram of the position structure of the stirring device provided in an embodiment of the present invention installed on the housing;

[0029] Figure 2 for Figure 1 The schematic diagram of the structure of the two groups of stirring blades of the stirring device being interlaced and connected;

[0030] Figure 3 for Figure 1 The schematic diagram of the position structure of the auxiliary heat dissipation pipe and the stirring shaft shown;

[0031] Figure 4 for Figure 1 The schematic diagram of the position structure of the heat dissipation channel and the stirring shaft shown;

[0032] Description of reference numerals:

[0033] 1-shell; 11-stirring chamber;

[0034] 2- stirring device;

[0035] 21-stirring assembly; 211-stirring shaft; 212-fixing tube; 213-connecting shaft; 214-stirring blade; 215-insulation tube;

[0036] 22- heat dissipation channel; 221- outlet end; 222- inlet end;

[0037] 31- Temperature sensor;

[0038] 4- auxiliary heat dissipation device; 41- auxiliary heat dissipation pipe;

[0039] 5. Drive motor. DETAILED DESCRIPTION

[0040] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0044] The embodiment of the present invention describes a microwave heating device for performing microwave pyrolysis reaction on a material, such as Figure 1As shown, the microwave heating equipment includes a shell 1, a stirring device 2 and a microwave generator. The shell 1 has a stirring chamber 11 for placing materials. The microwave generator is connected to the stirring chamber 11 to transmit the emitted microwaves to the inside of the stirring chamber 11. The microwaves generate heat required for the pyrolysis reaction of the material in the stirring chamber 11. The stirring device 2 is arranged in the stirring chamber 11. When the material undergoes pyrolysis reaction, the material is stirred to ensure uniform heating of the material, improve the pyrolysis effect of the material, and is conducive to the industrial application and promotion of microwave pyrolysis equipment.

[0045] In this embodiment, Figure 2 , Figure 3 , Figure 4 As shown, the stirring device 2 includes a stirring component 21, one end of which extends into the material for stirring the material, and the other end extends outside the shell 1 and is connected to the power output shaft of the drive motor 5 to drive the stirring shaft 211 to rotate, wherein the stirring component 21 is provided with a plurality of heat dissipation channels 22, and a coolant is input into the heat dissipation channel 22 to cool the stirring component 21. Specifically, the stirring component 21 includes a stirring shaft 211 and a fixed tube 212, the stirring shaft 211 is fixed inside the fixed tube 212, and the heat dissipation channel 22 is arranged near the stirring shaft 211. For example, the heat dissipation channel 22 can be arranged inside the stirring shaft 211 and inside the fixed tube 212. 2 and the stirring shaft 211 are provided with a conveying channel on both sides, and then the outlet end 221 of the conveying channel is connected with the heat dissipation channel 22, and the coolant is introduced into the conveying channel. After the coolant flows out from the outlet end 221 of the conveying channel, it enters the interior of the heat dissipation channel 22 and exchanges heat with the body of the stirring shaft 211. After the cooling work of the stirring shaft 211 is completed, the coolant is output from the conveying channel on the other side to complete the cooling work. The heat dissipation channel 22 is arranged close to the stirring shaft 211 to increase the cooling area, ensuring that the stirring shaft 211 is in a cooling state during the stirring of the material, avoiding thermal expansion and contraction caused by the high temperature of the stirring shaft 211, and solving the problem of uneven heating of the material.

[0046] In this embodiment, see Figure 2 , Figure 3 , Figure 4 The two ends of the stirring shaft 211 extend out of the two ends of the fixed tube 212, and the heat dissipation channel 22 can be arranged in the fixed tube 212 along the length direction of the fixed tube 212. The outlet end 221 and the inlet end 222 of the heat dissipation channel 22 are located outside the fixed tube 212. In this embodiment, the outlet end 221 and the inlet end 222 can be the above-mentioned conveying channel.

[0047] In order to circulate the coolant into the channel to cool the stirring shaft 211, in this embodiment, the heat dissipation channel 22 can be configured as a U-shaped channel, and the two ends of the U-shaped channel are the outlet end 221 and the inlet end 222 respectively.

[0048] In this embodiment, see Figure 2 The stirring assembly 21 further includes a plurality of connecting shafts 213 detachably connected to the stirring shaft 211, and a plurality of stirring blades 214 are provided on the connecting shaft 213. In specific applications, the stirring blades 214 can be arranged at intervals on the outer peripheral surface of the connecting shaft 213, and are arranged at a predetermined angle to the connecting shaft 213. For example, the stirring blades 214 can be arranged vertically to the connecting shaft 213, which is beneficial to ensure the uniformity of stirring and the balance of the stirring device 2 during rotation.

[0049] Specifically, the stirring blade 214 can be connected to the connecting shaft 213 via a flange. When the stirring blade 214 is worn during the stirring process, the stirring blade 214 can be replaced as a whole, which effectively improves the replacement efficiency. In this embodiment, the distance between two adjacent stirring blades 214 is set between 5-500mm. The stirring blade 214 can be set to a square shape. Of course, it can also be set to a diamond shape, a circle, a triangle or a spiral shape, and each blade can be set to the same shape or different shapes. The staff will perform specific applications according to the working conditions, which will not be elaborated here.

[0050] In this embodiment, the stirring assembly 21 also includes an insulation tube 215, which is arranged in the fixed tube 212, and then the stirring shaft 211 is vertically arranged inside the insulation tube 215. Of course, the insulation tube 215 can also be sheathed on the outside of the fixed tube 212, and the installation method is diverse.

[0051] In this embodiment, a temperature testing component is also included, which includes a temperature sensor 31. The temperature sensor 31 is arranged inside the above-mentioned stirring shaft 211 along the radial direction of the above-mentioned stirring shaft 211, and / or is arranged on the above-mentioned stirring blade 214. When the temperature sensor 31 is arranged on the stirring blade 214, the temperature sensor 31 can be installed in a sensor protection tube to protect the temperature sensor 31, so as to avoid the temperature sensor 31 being damaged by high-temperature materials and affecting the accuracy of the temperature measured by the temperature sensor 31. The temperature sensor 31 can be placed on the stirring and crushing blade to avoid the temperature sensor 31 being damaged by particulate materials.

[0052] In this embodiment, an auxiliary heat dissipation device 4 is also included. The auxiliary heat dissipation device 4 includes an auxiliary heat dissipation pipe 41. The auxiliary heat dissipation pipe 41 can be sleeved on the connection between the above-mentioned insulation pipe 215 and the above-mentioned stirring chamber 11. Cooling liquid is transported in the auxiliary heat dissipation pipe 41 to cool the above-mentioned insulation pipe 215 exposed on the stirring chamber 11. Specifically, the connection is made through a bearing structure. After cooling, the temperature of the insulation pipe 215 at the connection and the connection between the bearing seat and the bearing is reduced, thereby ensuring the long-term operation of the stirring bearing in high-temperature equipment and effectively solving the problem of thermal expansion of the bearing in temperature. Specifically, an open end for transporting cooling liquid can be opened on the tube body of the auxiliary heat dissipation pipe, and the cooling liquid is transported to the inside of the auxiliary heat dissipation pipe along the open end to fill the auxiliary heat dissipation pipe.

[0053] In this embodiment, a plurality of stirring components 21 can be arranged in the stirring chamber 11, for example, two groups, three groups, or four groups. The increase in the number of stirring components 21 can improve the stirring efficiency of the material. The staff will set the corresponding number according to specific needs, wherein each stirring blade 214 is interspersed. By setting more than two groups of stirring devices 2, the stirring and crushing blades between the two groups of stirring devices 2 are used in conjunction with each other, so that the crossed stirring blades 214 can crush the agglomerated medium while stirring the medium.

[0054] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A microwave heating device, characterized in that: include: A housing (1), wherein the interior of the housing (1) has a stirring chamber (11) for placing materials; A stirring device (2) is arranged in the stirring chamber (11), one end of the stirring device (2) extends into the stirring chamber (11), at least two stirring devices (2) are provided, and the stirring device (2) comprises a stirring assembly (21); One end of the stirring component (21) extends into the material, and a plurality of heat dissipation channels (22) are provided inside the stirring component (21); the other end of the stirring component (21) extends outside the housing (1) and is connected to the power output shaft of the driving motor to drive the stirring shaft to rotate; The stirring assembly (21) comprises a stirring shaft (211), and the heat dissipation channel (22) is arranged close to the stirring shaft (211); The stirring assembly (21) further comprises a fixed tube (212) on which the stirring shaft (211) is arranged, two ends of the stirring shaft (211) extend out of two ends of the fixed tube (212), the heat dissipation channel (22) is arranged inside the fixed tube (212) along the length direction of the fixed tube (212), and the outlet end (221) and the inlet end (222) of the heat dissipation channel (22) are located outside the upper end of the fixed tube (212); The stirring assembly (21) further comprises a plurality of connecting shafts (213) detachably connected to the stirring shaft (211), wherein the connecting shafts (213) are provided with a plurality of stirring blades (214), and the stirring blades (214) of each stirring device (2) are interlaced and arranged; A heat preservation pipe (215) is provided inside the fixed pipe (212) or outside the fixed pipe (212), and the stirring shaft (211) is located inside the heat preservation pipe (215); The heat dissipation channel (22) is configured as a U-shaped channel, and two ends of the U-shaped channel are respectively the outlet end (221) and the inlet end (222); The microwave heating device further comprises an auxiliary heat dissipation device (4), wherein the auxiliary heat dissipation device (4) comprises an auxiliary heat dissipation pipe (41), wherein the auxiliary heat dissipation pipe (41) is sleeved at the connection between the heat preservation pipe (215) and the stirring chamber (11), and wherein a cooling liquid is transported in the auxiliary heat dissipation pipe (41) to cool the heat preservation pipe (215) exposed to the stirring chamber (11).

2. The microwave heating device according to claim 1, characterized in that: The stirring blades (214) are arranged at intervals on the outer peripheral surface of the connecting shaft (213) and are arranged at a predetermined angle with the connecting shaft (213).

3. The microwave heating device according to claim 2, characterized in that: It also comprises a temperature testing component (3), wherein the temperature testing component comprises a temperature sensor (31), wherein the temperature sensor (31) is arranged inside the stirring shaft (211) along the radial direction of the stirring shaft (211), and / or is arranged on the stirring blade (214).

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