Continuous heating equipment
By using a twin-screw extruder and a microwave generator in a continuous heating system, the problem of the difficult decomposition of composite materials was solved, achieving rapid and efficient thermal pyrolysis and high-temperature reaction, thus enhancing the recycling value.
Patent Information
- Application Number
- CN202423298510.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Composite materials are difficult to break down into reusable raw materials during recycling, resulting in low recycling value.
The continuous heating equipment, which includes a twin-screw extruder and a microwave generator, transmits microwaves in the heating section through a microwave heater, allowing heat to be transferred from the inside of the material to the outside. Combined with the design of the preheating section and the discharge section, it achieves rapid heating and efficient decomposition.
It enables rapid high-temperature decomposition of composite materials, improves recycling efficiency, reduces equipment heat resistance requirements and operating costs, and the equipment is easy to disassemble and adjust, making it suitable for the thermal pyrolysis of various materials.
Smart Images
Figure CN223875777U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a continuous heating equipment, in particular to a microwave heating pyrolysis equipment. BACKGROUND
[0002] With the development of science and technology, composite materials are often used as parts of products in various fields. Alternatively, when manufacturing various products, waste containing composite materials is often generated.
[0003] However, when these products or waste containing composite materials need to be recycled, the composite materials are often not easy to decompose into reusable and simple ingredient raw materials, resulting in low recycling value. Therefore, how to design a continuous heating equipment capable of heating and decomposing composite materials has become a problem that personnel in the field urgently want to solve. SUMMARY
[0004] The utility model discloses a continuous heating equipment capable of heating and decomposing composite materials.
[0005] The continuous heating equipment disclosed by an embodiment of the utility model comprises a double-screw extruder and a microwave generating device. The double-screw extruder comprises a sleeve and a double screw. The sleeve has at least one feeding section, at least one heating section and at least one discharging section arranged in sequence. The at least one feeding section, the at least one heating section and the at least one discharging section are in communication with each other and form a conveying space. The double screw is rotatably arranged in the conveying space. The microwave generating device comprises a waveguide and a microwave heater. The waveguide is directly arranged at the at least one heating section of the sleeve. The microwave heater is directly arranged at the side of the waveguide away from the sleeve. The microwave heater sends microwaves to the at least one heating section through the waveguide.
[0006] According to the continuous heating equipment disclosed in the above embodiment, the microwave generating device is used to send microwaves to the material in the heating section, so that heat can be transferred from the inside of the material to the outside, and the material can quickly reach the set temperature.
[0007] The above description of the utility model and the following description of the embodiments are used to demonstrate and explain the principle of the utility model, and provide further explanation of the patent application scope of the utility model. BRIEF DESCRIPTION OF DRAWINGS
[0008] Figure 1 is a schematic view of the continuous heating equipment according to an embodiment of the utility model;
[0009] Figure 2 is Figure 1 a partial enlarged schematic view of the continuous heating equipment.
[0010]
Symbol explanation
[0011] 10: continuous heating device
[0012] 100: twin-screw extruder
[0013] 110: sleeve
[0014] 111: feeding section
[0015] 111a: feeding port
[0016] 111b: air inlet
[0017] 112: preheating section
[0018] 113: heating section
[0019] 114: discharging section
[0020] 114a: discharging port
[0021] 114b: air outlet
[0022] 120: twin screw
[0023] 200: feeding hopper
[0024] 300: air inlet pipe
[0025] 400: preheater
[0026] 500: microwave generating device
[0027] 510: waveguide
[0028] 520: microwave heater
[0029] OBJ: material
[0030] TPS: transport space
[0031] M1: feeding and air inlet module
[0032] M2: preheating module
[0033] M3: microwave module
[0034] M4: discharging module
[0035] M5: air outlet module
[0036] MT1, MT2: motor DETAILED DESCRIPTION
[0037] A continuous heating device 10 according to an embodiment of the present application will be described below. Please refer to Figures 1 to 2 , wherein Figure 1is a schematic view of a continuous heating apparatus according to an embodiment of the present application, and Figure 2 is Figure 1 a partial enlarged schematic view of the continuous heating apparatus.
[0038] The continuous heating apparatus 10 disclosed in the present embodiment is, for example, an apparatus capable of continuously performing high-temperature reaction on a solid or fluid organic material OBJ to pyrolyze the material OBJ into small molecules or oligomer raw materials. The continuous heating apparatus 10 can include a twin-screw extruder 100, a feeding hopper 200, an air inlet pipe 300, a plurality of preheaters 400, and a microwave generating device 500.
[0039] The twin-screw extruder 100 includes a sleeve 110 and a twin screw 120. The sleeve 110 can have a feeding section 111, a plurality of preheating sections 112, a plurality of heating sections 113, and a plurality of discharging sections 114 arranged in sequence.
[0040] The feeding section 111 can have a feeding port 111a and an air inlet port 111b. The feeding port 111a can be farther away from the preheating sections 112 and the heating sections 113 than the air inlet port 111b.
[0041] The preheating sections 112 are detachable from each other and are detachably arranged between the feeding section 111 and the heating sections 113.
[0042] The heating sections 113 are detachable from each other and are detachably arranged between the feeding section 111 and the discharging sections 114. In the present embodiment, the heating sections 113 are indirectly detachably arranged in the feeding section 111 through the preheating sections 112. However, the present application is not limited thereto. In some embodiments, the preheating sections can be omitted, and the heating sections can be directly detachably arranged in the feeding section.
[0043] The discharging sections 114 are detachable from each other and are detachably arranged on a side of the heating sections 113 away from the feeding section 111 and the preheating sections 112. One of the discharging sections 114 can have a discharging port 114a, and the other of the discharging sections 114 can have an air outlet port 114b. The discharging port 114a can be farther away from the heating sections 113 than the air outlet port 114b.
[0044] The feeding section 111, the preheating section 112, the heating section 113 and the discharging section 114 are in communication with each other and form a conveying space TPS. The twin screw 120 is rotatably arranged in the conveying space TPS, for example, by driving of a conveying motor MT1, to facilitate continuous conveying of solid or fluid material in the conveying space TPS. The twin screw 120 has low requirements on the type or specification of the material OBJ to be conveyed, so that the continuous heating device 10 can be applied to pyrolysis of various materials OBJ. In contrast, the single screw used in the prior art needs to fill the space in the single screw with material, to provide sufficient pressure to push the material forward.
[0045] The feeding hopper 200 is in communication with the feeding section 111 via a feeding port 111a, and the feeding hopper 200 can be connected to a feeding motor MT2, for example, to assist feeding. The air inlet pipe 300 is in communication with the feeding section 111 via an air inlet port 111b. The feeding hopper 200 and the air inlet pipe 300 are arranged in the feeding section 111 and form a feeding and air inlet module M1. It should be noted that in some embodiments, the number of feeding sections can also be multiple, and these feeding sections can be detachable from each other, and the feeding hopper and the air inlet pipe can be arranged in and in communication with different feeding sections, respectively, and form a feeding module and an air inlet module, respectively.
[0046] The preheater 400 can be directly arranged in the preheating section 112. The preheater 400 is, for example, an electric heating tube or a heat medium oil, which can be used as a medium to generate heat, and can provide heat radiation to the preheating section 112, for example. The preheater 400 can be arranged inside or outside the sleeve 110, without being limited thereto.
[0047] One of the preheaters 400 and one of the preheating sections 112 can be arranged in each other and form a preheating module M2. The number of the preheaters 400 and the number of the preheating sections 112 are the same, and the total number of the preheaters 400 and the preheating sections 112 in each preheating module M2 is one. It should be noted that in some embodiments, the number of the preheaters and the number of the preheating sections can also be only one, to form only one preheating module. It should be noted that in some embodiments, multiple preheaters can be arranged on multiple sides of the preheating section, so that the number of the preheaters and the number of the preheating sections in one preheating module can also be multiple, in addition to one.
[0048] The microwave generating device 500 can include a plurality of waveguides 510 and a plurality of microwave heaters 520. The waveguides 510 are directly disposed on the heating section 113 of the sleeve 110. The microwave heaters 520 are directly disposed on the side of the waveguides 510 away from the sleeve 110, and the microwave heaters 520 transmit microwaves to the heating section 113 via the guidance of the waveguides 510. The heating section 113 can have a microwave transmission interface (not labeled separately) on the side close to the waveguides 510 to facilitate the transmission of microwaves transmitted by the microwave generating device 500, and the microwave transmission interface can be made of a non-metallic material such as polytetrafluoroethylene (commonly known as Teflon), ceramic, or quartz that does not reflect microwaves.
[0049] One of the waveguides 510, one of the microwave heaters 520, and one of the heating sections 113 can be disposed with each other to form a microwave module M3. The number of waveguides 510, microwave heaters 520, and heating sections 113 is the same, and the total number of each of the waveguides 510, microwave heaters 520, and heating sections 113 in each microwave module M3 is one. It should be noted that in some embodiments, the number of waveguides, microwave heaters, and heating sections can also be only one to form only one microwave module. It should be noted that in some embodiments, multiple waveguides and multiple microwave heaters can be disposed on multiple sides of the heating section, so that the number of each of the waveguides, microwave heaters, and heating sections in one microwave module can also be multiple in addition to one. In some embodiments, the number of waveguides 510, microwave heaters 520, and heating sections 113 can also be different.
[0050] In addition, the discharge section 114 with the discharge port 114a forms a discharge module M4, and the discharge section 114 with the gas outlet 114b forms a gas outlet module M5. It should be noted that in some embodiments, there can also be only one discharge section with both a discharge port and a gas outlet to form only one discharge and gas outlet module.
[0051] The operation of the continuous heating device 10 will be described below. The continuous heating device 10 can collect a material OBJ through the feed hopper 200, and the material OBJ can enter the feeding section 111 through the feeding port 111a. In addition, the continuous heating device 10 can also pass the non-active gas (not shown) such as nitrogen and noble gas through the gas inlet pipe 300 to enter the conveying space TPS through the gas inlet port 111b.
[0052] Then, the continuous heating device 10 can convey the material OBJ from the feeding section 111 to the preheating section 112 through the double screw 120. The preheater 400 can be in thermal contact with the material OBJ conveyed to the preheating section 112 to preheat the material OBJ.
[0053] Then, the continuous heating device 10 can continue to transport the material OBJ from the preheating section 112 to the heating section 113 by the double screw 120. The microwave generating device 500 can send microwaves to the material OBJ transported to the heating section 113 to heat the material OBJ.
[0054] Then, the continuous heating device 10 can continue to transport the heated material OBJ from the heating section 113 to the discharging section 114 by the double screw 120, so that the solid or fluid products decomposed from the heated material OBJ can be extruded out of the conveying space TPS through the discharge port 114a, and the gas decomposed from the heated material OBJ can be discharged out of the conveying space TPS through the gas outlet 114b. These gases, solid or fluid products extruded or discharged out of the conveying space TPS can be recycled for reuse. Note that the gas, solid or fluid products decomposed from the heated material OBJ can be combusted with oxygen in the high-temperature conveying space TPS because they have been decomposed into small molecules. The non-active gas entering the conveying space TPS through the gas inlet pipe 300 and the gas inlet port 111b can avoid the risk of such combustion reaction.
[0055] Since the continuous heating device 10 sends microwaves to the material OBJ in the heating section 113 by the microwave generating device 500, heat can be transferred from the inside of the material OBJ to the outside. Compared with the conventional way of transferring heat from the outside of the material to the inside, the continuous heating device 10 of the present application can quickly heat the material OBJ to a set temperature, such as the temperature at which thermal cracking begins, and can effectively achieve continuous high-temperature reaction.
[0056] In addition, compared with the conventional way of transferring heat from the outside of the material to the inside, the continuous heating device 10 of the present application has lower heat resistance requirements for the sleeve 110 and higher heating efficiency for the material OBJ, which can save manufacturing and operating costs and shorten the length of the continuous heating device 10.
[0057] Furthermore, by the design of the feeding air inlet module M1, the preheating module M2, the microwave module M3, the discharging module M4 and the air outlet module M5, the number of each module can be increased or decreased according to the characteristics of the material OBJ to be heated or other use requirements, so as to adjust the length of the conveying space TPS, and then the size of the continuous heating device 10 can be adjusted. In addition, the continuous heating device 10 can also be easily disassembled for transportation. In addition, the design of the microwave module M3 can allow a certain number of microwave heaters 520 to correspond to only one heating section 113, so that the microwave received by each heating section 113 is uniformly distributed, and the material OBJ does not have uneven heating, which is beneficial to the temperature control of the continuous heating device 10 of the utility model. In addition, in some cases, the power of the microwave heater 520 in each microwave module M3 can also be adjusted according to requirements, for example, gradually increasing the power of the microwave emitted to the material OBJ.
[0058] In addition, by the arrangement of the preheating section 112 and the preheater 400, the material OBJ can be externally heated before receiving the microwave, so as to shorten the time for the material OBJ to reach the set temperature inside and outside. In addition, in some cases, by preheating the material OBJ by the preheater 400, the material OBJ can be in a slightly molten state, which is beneficial to the conveying of the material OBJ by the double screw 120. It should be noted that in some embodiments, the material can also not be externally preheated before receiving the microwave, or the material can also be heated to a slightly molten state before entering the conveying space, so that the preheating section and the preheater can be omitted. In some embodiments, the preheating section and the preheater in the continuous heating device can be removed by removing the preheating module.
[0059] In some embodiments, a microwave absorber can be added to the material to help the material heat smoothly from the inside to the outside after receiving the microwave.
[0060] In some embodiments, if it is determined that the gas, solid or fluid product decomposed by the material after heating does not have the risk of combustion reaction with oxygen or other possible risks, non-active gas can not be introduced and the air inlet and the air inlet pipe and the like can be omitted.
[0061] In some embodiments, the feeding hopper can be omitted and other feeding methods such as a mechanical arm or a conveyor belt can be used.
[0062] In some embodiments, the feeding port and the air inlet port can be arranged as the same opening.
[0063] In some embodiments, the discharging port and the air outlet port can be arranged as the same opening.
[0064] According to the continuous heating device of the above-mentioned embodiments, the material in the heating section is sent microwaves by the microwave generating device, so that heat is transferred from the inside of the material to the outside. Compared with the conventional method of transferring heat from the outside of the material to the inside, the continuous heating device of the present application can quickly heat the material to a set temperature, such as the temperature at which thermal cracking begins, so that continuous high-temperature reaction can be effectively achieved.
[0065] In addition, compared with the conventional method of transferring heat from the outside of the material to the inside, the continuous heating device of the present application has lower heat resistance requirements for the sleeve and higher heating efficiency for the material, thereby saving manufacturing and operating costs and shortening the length of the continuous heating device.
[0066] Furthermore, by designing the feeding and air inlet module, the preheating module, the microwave module, the discharging module and the air outlet module, the number of each module can be increased or decreased according to the characteristics of the material to be heated or other use requirements, so that the length of the conveying space can be adjusted, and thus the size of the continuous heating device can be adjusted. In addition, the continuous heating device can be easily disassembled for transportation. In addition, the design of the microwave module allows a specific number of microwave heaters to correspond to only one heating section, so that the microwaves received by each heating section are uniformly distributed, and uneven heating of the material does not occur, which is beneficial to the temperature control of the continuous heating device of the present application. In addition, in some cases, the power of the microwave heaters in each microwave module can be adjusted according to requirements, such as gradually increasing the power of the microwaves emitted to the material.
[0067] In addition, by providing the preheating section and the preheater, the material can be heated from the outside before receiving microwaves, so as to shorten the time for the material to reach the set temperature inside and outside. In addition, in some cases, by preheating the material with the preheater, the material can be in a slightly molten state, which is beneficial to the conveying of the material by the twin screws.
Claims
1. A continuous heating device, characterized in that, Include: A twin-screw extruder, comprising: A conveying system comprising at least one feed section, at least one heating section, and at least one discharge section arranged in sequence, wherein the at least one feed section, the at least one heating section, and the at least one discharge section are interconnected and form a conveying space; and A twin-screw is rotatably disposed within the conveying space; and A microwave generating device, comprising: A waveguide, directly disposed within the at least one heating section of the sleeve; and A microwave heater is disposed directly on the side of the waveguide away from the sleeve, wherein the microwave heater transmits microwaves to at least one heating section via the waveguide.
2. The continuous heating device as described in claim 1, characterized in that, The number of at least one heating section is multiple, the number of waveguides is multiple, the number of microwave heaters is multiple, the heating sections are detachable from each other, the heating sections are detachably disposed between the at least one feeding section and the at least one discharging section, and one of the heating sections, one of the waveguides and one of the microwave heaters are disposed together to form a microwave module.
3. The continuous heating device as described in claim 2, characterized in that, The total number of each of the heating sections, waveguides, and microwave heaters in each microwave module is at least one.
4. The continuous heating device as described in claim 1, characterized in that, It also includes a preheater, wherein the sleeve further has at least one preheating section, the at least one preheating section being detachably disposed and connected between the at least one feed section and the at least one heating section, and the preheater being disposed in the at least one preheating section.
5. The continuous heating device as described in claim 4, characterized in that, The number of the at least one preheating section is multiple, the number of the preheaters is multiple, the preheating sections are detachable from each other, and one of the preheating sections and one of the preheaters are arranged together to form a preheating module.
6. The continuous heating device as described in claim 1, characterized in that, It also includes a feed hopper, wherein the at least one feed section has a feed inlet, and the feed hopper is connected to the at least one feed section via the feed inlet.
7. The continuous heating device as described in claim 1, characterized in that, It also includes an air inlet pipe, wherein the at least one feed section has an air inlet, the air inlet pipe is connected to the at least one feed section via the air inlet, and the air inlet pipe is used to allow an inactive gas to enter the conveying space via the air inlet.
8. The continuous heating device as described in claim 7, characterized in that, The at least one feed section and the air inlet pipe are arranged together to form a feed and air inlet module.
9. The continuous heating device as described in claim 1, characterized in that, The at least one discharge section has a discharge port and a gas outlet. The discharge port is used to expel solid or fluid products formed by the decomposition of a material after heating from the conveying space, and the gas outlet is used to discharge gaseous products formed by the decomposition of a material after heating from the conveying space.
10. The continuous heating device as described in claim 9, characterized in that, The number of at least one discharge section is multiple, and the discharge sections are detachable from each other. The discharge sections are detachably disposed on the side of the at least one heating section away from the at least one feeding section. One of the discharge sections has the discharge port, and the other of the discharge sections has the air outlet. The at least one discharge section with the discharge port forms a discharge module, and the at least one discharge section with the air outlet forms an air outlet module.
11. The continuous heating device as described in claim 1, characterized in that, The sleeve has at least one heating section with a microwave transmission interface on the side near the waveguide to facilitate the passage of microwaves emitted by the microwave generating device.