Biomass electromagnetic heating high-temperature pyrolysis carbonization structure

Abstract

The utility model relates to the technical field of pyrolysis and carbonization, and particularly discloses a biomass electromagnetic heating high-temperature pyrolysis and carbonization structure which comprises a cylinder body and an electromagnetic induction coil arranged on the outer side of the cylinder body, fins are arranged on the outer wall of the cylinder body, the outer sides of the fins are coated with a coil heat insulation layer, the electromagnetic induction coil is wound on the outer wall of the coil heat insulation layer, and a spiral conveyor used for conveying external biomass is rotationally arranged in the cylinder body; rapid and uniform heating is achieved by combining the electromagnetic induction coil with the fin structure, the problem of local overheating or uneven heating in a traditional mode is avoided, efficient heat conduction and heat preservation effects are achieved by combining the barrel fins with the heat preservation and heat insulation structure, and by means of the height arrangement of the fins, the heat preservation efficiency is improved. The adverse effect on equipment after the biomass high-temperature pyrolysis carbonization starts graphitization under the action of the magnetic field of the electromagnetic induction coil is avoided, so that the equipment can stably operate for a long time.

Description

TECHNICAL FIELD

[0001] The utility model relates to pyrolysis carbonization technical field especially discloses a kind of high-temperature pyrolysis carbonization structures of biomass electromagnetic heating. BACKGROUND

[0002] As a kind of renewable energy, biomass resources are widely concerned in recent years due to its extensive source and low carbon environmental characteristics. When comprehensively utilizing biomass resources, pyrolysis carbonization technology, as an important processing method, can efficiently convert biomass resources into high-value-added products such as combustible gas, tar and biochar. However, the current traditional biomass pyrolysis carbonization equipment has high manufacturing cost, complex structure and unstable operation problems. SUMMARY

[0003] To overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide a kind of high-temperature pyrolysis carbonization structures of biomass electromagnetic heating to solve the technical problems of high equipment manufacturing cost, complex structure and unstable operation in the prior art.

[0004] To achieve the above-mentioned purpose, the utility model provides a kind of high-temperature pyrolysis carbonization structures of biomass electromagnetic heating, which comprises a cylinder and an electromagnetic induction coil arranged outside the cylinder. The outer wall of the cylinder is provided with fins, and the outer side of the fin is covered with a coil heat insulation layer. The electromagnetic induction coil is wound on the outer wall of the coil heat insulation layer. A spiral conveyor for conveying external biomass is rotatably arranged inside the cylinder.

[0005] Further, the number of fins is multiple, and the multiple fins are arranged around the central axis of the cylinder and extend away from the outer wall of the cylinder.

[0006] Further, the extension direction of the fin is perpendicular to the axial direction of the cylinder, and the cross section of the fin is rectangular and the longitudinal section is annular.

[0007] Further, the fin is arranged in the axial direction of the cylinder, and the cross section of the fin is rectangular strip.

[0008] Further, the thickness of the fin is 1-3mm, and the height of the fin is 150-200mm.

[0009] Further, two jacket insulation layers are arranged at both ends of the cylinder, and the ends close to each other of the two jacket insulation layers respectively abut and hold the two ends of the coil heat insulation layer in the axial direction.

[0010] Further, the outer side of the fin is covered with an outer jacket, and the heat insulation layer is covered outside the outer jacket.

[0011] Further, the outer jacket is provided with a first mounting joint, the first mounting joint extends from the outer wall of the outer jacket to the electromagnetic induction coil and penetrates the coil heat insulation layer, and the first mounting joint is provided with a first thermocouple for detecting the surface temperature of the outer wall of the outer jacket.

[0012] Further, the cylinder is provided with a second mounting joint, the second mounting joint extends from the outer wall of the cylinder to the electromagnetic induction coil and penetrates the outer jacket and the coil heat insulation layer in sequence, and the second mounting joint is provided with a second thermocouple for detecting the surface temperature of the outer wall of the cylinder.

[0013] Further, the screw conveyor comprises a rotating shaft rotatably arranged in the cylinder and a conveying blade arranged in a spiral around the rotating shaft, the cylinder has a feeding port and a discharging port, and the rotating shaft is driven by an external driving member and drives the conveying blade to rotate, so as to convey the external biomass from the feeding port to the discharging port.

[0014] Further, the conveying blade is provided with a notch for facilitating the discharge of the gas generated by the pyrolysis of the biomass in the cylinder.

[0015] Further, the biomass electromagnetic heating high-temperature pyrolysis and carbonization structure further comprises an exhaust pipe communicating with the inner cavity of the cylinder, and the gas generated by the pyrolysis of the biomass in the cylinder is discharged through the exhaust pipe.

[0016] The present scheme realizes the high-temperature pyrolysis and carbonization of the biomass in the cylinder through electromagnetic induction heating. After the electromagnetic induction coil is powered on, an alternating magnetic field is generated, which cooperates with the fin structure of the outer wall of the cylinder to quickly conduct heat to the inside of the cylinder through eddy current effect, realizing efficient and uniform heating. The screw conveyor arranged in the cylinder rotates under the action of the external driving member, uniformly stirs the biomass in the cylinder and pushes it forward, and at the same time, the combustible gas generated by pyrolysis is discharged through the notch on the conveying blade, avoiding excessive gas pressure in the cylinder. In addition, the jacket heat insulation layer, the coil heat insulation layer and the outer jacket structure jointly reduce heat loss and improve heat energy utilization efficiency, and at the same time, precise temperature monitoring and adjustment are realized through the thermocouples.

[0017] The beneficial effects of the present utility model are as follows: the electromagnetic induction coil combined with the fin structure realizes rapid and uniform heating, avoiding the problems of local overheating or uneven heating in the traditional way; the fin of the cylinder is combined with the heat insulation structure to realize efficient heat conduction and heat preservation effect, avoiding complex pipeline design, and the overall equipment structure is compact and convenient to maintain; at the same time, the thermocouples are used to accurately monitor the temperature of the cylinder and the outer wall, ensuring the stability of the pyrolysis process. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is a three-dimensional structure schematic diagram of the present utility model;

[0019] Fig. 2 is a longitudinal sectional view of the present application;

[0020] Fig. 3 is a transverse sectional view of the present application;

[0021] Fig. 4 is a schematic diagram of the three-dimensional structure of the spiral conveyor of the present application.

[0022] Reference signs include:

[0023] 1, cylinder; 2, fin; 3, coil heat insulation layer; 4, electromagnetic induction coil; 5, jacket heat insulation layer;

[0024] 6, outer jacket; 61, first mounting joint; 62, first thermocouple; 7, spiral conveyor; 71, rotating shaft;

[0025] 72, conveying blade; 8, exhaust pipe; 9, assembly; 11, second mounting joint; 12, second thermocouple;

[0026] 13, feed inlet; 14, discharge outlet. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of those skilled in the art, the present application will be further described below in conjunction with the embodiments and drawings. The content mentioned in the embodiments is not a limitation of the present application.

[0028] Please refer to Figs. 1 to 4 The present application is a biomass electromagnetic heating high-temperature pyrolysis carbonization structure. Biomass is fed into the feed inlet 13 of the cylinder 1, and under the action of the spiral conveyor 7, the biomass is gradually conveyed to the discharge outlet 14. The electromagnetic induction coil 4 heats the cylinder 1, and the fin 2 structure on the outer wall of the cylinder 1 improves the heat conduction efficiency, so that the inside of the cylinder 1 reaches a high-temperature state, realizing the high-temperature pyrolysis carbonization of biomass. The gas generated by pyrolysis is discharged through the exhaust pipe 8, and the multi-layer insulation structure outside the cylinder 1 ensures the heating efficiency and heat stability. At the same time, the height of the fin 2 makes the distance between the biomass and the electromagnetic induction coil 4 exceed the graphite electromagnetic induction distance, so even if the biomass raw material begins to graphitize after high-temperature pyrolysis, the graphite itself will not be heated by the induction magnetic field, improving the stability of the equipment.

[0029] The structure includes: electromagnetic induction coil 4, coil heat insulation layer 3, fin 2, outer jacket 6, cylinder 1, jacket insulation layer 5, thermocouple mounting joint, thermocouple, screw conveyor 7 (rotating shaft 71 and conveying blade 72) and exhaust pipe 8, etc. The specific structure of each part is as follows: the cylinder 1 is a cylindrical structure, which is used for high-temperature pyrolysis reaction of biomass, and a plurality of fins 2 are uniformly welded on the outer wall of the cylinder 1. A plurality of fins 2 are arranged along the radial direction of the cylinder 1, and the fins 2 are arranged around the central axis of the cylinder 1. The height of the fin 2 ranges from 150mm to 200mm, and the thickness ranges from 1mm to 3mm.

[0030] The extension direction of the fin 2 is perpendicular to the axial direction of the cylinder 1, and the cross section is rectangular. The fin 2 is mainly used to increase the heat transfer area, and on this basis, the height of the fin 2 is increased so that the distance between the biomass in the cylinder 1 and the electromagnetic induction coil 4 exceeds the graphite electromagnetic induction distance. Even if the biomass begins to graphitize after high-temperature pyrolysis, the graphite itself will not be heated by the induction magnetic field, thereby avoiding the adverse effects on the equipment and ensuring the stable operation of the equipment.

[0031] The outer side of the fin 2 is welded with the outer jacket 6, which is made of metal material, and the coil heat insulation layer 3 is coated on the outer wall of the outer jacket 6, and the thickness is 20mm to 50mm, and the material is preferably a combination of aluminum silicate fiber (inner layer) and aerogel (outer layer). The jacket insulation layer 5 is installed on both sides of the outer jacket 6, which further reduces heat loss.

[0032] The electromagnetic induction coil 4 is uniformly arranged on the outer surface of the coil heat insulation layer 3, and the alternating magnetic field generated by the energization is used to heat the metal material of the outer jacket 6, and the heat is transmitted to the inside of the cylinder 1 through the fin 2 and the cylinder 1.

[0033] The screw conveyor 7 is arranged in the cylinder 1, which is composed of the rotating shaft 71 and the conveying blade 72 arranged around it. The notch opened on the conveying blade 72 provides a gas exhaust passage for the pyrolysis gas. These gases flow through the notch during the rotation of the conveying blade 72, so as not to be trapped too much between the conveying blade 72 and the biomass. This design improves the gas discharge efficiency, reduces the possibility of pyrolysis gas accumulation, and ensures that the gas can be smoothly discharged from the cylinder 1. The screw conveyor 7 is driven by an external driving member, and the biomass is gradually conveyed from the inlet 13 to the outlet 14 through the conveyor. The cylinder 1 is connected with the exhaust pipe 8 at the top, and the pyrolysis gas is discharged through the exhaust pipe 8.

[0034] The thermocouples are respectively installed on the outer jacket 6 and the cylinder 1 for real-time detection of the surface temperature. The thermocouple is fixed on the equipment through the mounting joint. When the detected temperature exceeds the set value, the system will send an alarm signal to prevent overheating from causing structural damage.

[0035] Specific workflow as follows: biomass raw materials through the feed inlet 13 into the cylinder 1, under the action of screw conveyor 7, biomass from the feed inlet 13 is gradually pushed to the discharge port 14.In the process, electromagnetic induction coil 4 after power generation alternating magnetic field, the metal outer jacket 6 heating.Heat is transferred to the cylinder 1 through the fin 2, so that the cylinder 1 in the biomass to pyrolysis required high temperature (700 ℃ ~ 1100 ℃).High temperature under the biomass fast pyrolysis, generate biochar and pyrolysis gas, biochar via the discharge port 14 to the next process, pyrolysis gas through the exhaust pipe 8 to the outside.

[0036] The multilayer insulation structure between the outer jacket 6 and the cylinder 1 reduces heat loss and improves pyrolysis efficiency. The thermocouple monitors the temperature change in real time. When the temperature exceeds the set range, the system automatically adjusts the power of the induction coil or sends an alarm to ensure safe operation of the equipment.

[0037] The present scheme solves the technical problems of unstable operation, low thermal efficiency and poor long-term stability of traditional equipment through optimized fin 2 design, electromagnetic heating and multilayer insulation structure. The height and layout of the fin 2 make the induction heating distance greater than the magnetic induction range of graphitized biomass, avoiding secondary heating of biochar and equipment damage.

[0038] The above content is only the preferred embodiment of the present application. For those skilled in the art, according to the idea of the present application, the specific implementation and application range will be changed, and the content of the specification should not be understood as limiting the present application.

Claims

1. A biomass electromagnetic heating high-temperature pyrolysis carbonization structure, comprising a cylinder (1) and an electromagnetic induction coil (4) arranged outside the cylinder (1); characterized in that: The outer wall of the cylinder (1) is provided with fins (2), the outer side of the fin (2) is covered with a coil heat insulation layer (3), the electromagnetic induction coil (4) is arranged on the outer wall of the coil heat insulation layer (3), and the cylinder (1) is rotatably provided with a screw conveyor (7) for conveying external biomass.

2. The biomass electromagnetic heating pyrolysis carbonization structure according to claim 1, characterized in that: The number of fins (2) is multiple, and the multiple fins (2) are arranged around the central axis of the cylinder (1) and extend away from the outer wall of the cylinder (1).

3. The biomass electromagnetic heating pyrolysis carbonization structure according to claim 1, wherein: The fin (2) extends in the axial direction of the cylinder (1), and the cross section of the fin (2) is a rectangular strip.

4. The biomass electromagnetic heating pyrolysis carbonization structure according to claim 1, wherein: The thickness of the fin (2) is 1-3mm, and the height of the fin (2) is 150-200mm.

5. The biomass electromagnetic heating pyrolysis carbonization structure according to claim 1, wherein: The two ends of the cylinder (1) are provided with two jacket insulation layers (5), and the two ends of the two jacket insulation layers (5) are respectively arranged on the two ends of the coil heat insulation layer (3) in the axial direction.

6. The biomass electromagnetic heating pyrolysis carbonization structure according to claim 1, wherein: The outer side of the fin (2) is covered with an outer jacket (6), and the heat insulation layer is covered on the outer side of the outer jacket (6).

7. The biomass electromagnetic heating pyrolysis carbonization structure according to claim 6, characterized in that: The outer jacket (6) is provided with a first mounting connector (61), the first mounting connector (61) extends from the outer wall of the outer jacket (6) to the electromagnetic induction coil (4) and penetrates the coil heat insulation layer (3), and the first mounting connector (61) is provided with a first thermocouple (62) for detecting the surface temperature of the outer wall of the outer jacket (6).

8. The biomass electromagnetic heating pyrolysis carbonization structure according to claim 7, characterized in that: The cylinder (1) is provided with a second mounting connector (11), the second mounting connector (11) extends from the outer wall of the cylinder (1) to the electromagnetic induction coil (4) and penetrates the outer jacket (6) and the coil heat insulation layer (3) in sequence, and the second mounting connector (11) is provided with a second thermocouple (12) for detecting the surface temperature of the outer wall of the cylinder (1).

9. The biomass electromagnetic heating pyrolysis carbonization structure according to claim 1, wherein: The screw conveyor (7) includes a rotating shaft (71) rotatably arranged in the cylinder (1) and a conveying blade (72) arranged in a spiral shape around the rotating shaft (71), the cylinder (1) has a feeding port (13) and a discharging port (14), the rotating shaft (71) is driven by an external driving member and drives the conveying blade (72) to rotate, so as to convey the external biomass from the feeding port (13) to the discharging port (14) of the cylinder (1); the conveying blade (72) is provided with a gap for facilitating the discharge of gas generated by the pyrolysis of biomass in the cylinder (1).

10. The biomass electromagnetic heating pyrolysis carbonization structure according to claim 9, wherein: The biomass electromagnetic heating high-temperature pyrolysis carbonization structure further comprises an exhaust pipe (8) communicated to the inner cavity of the cylinder (1), and the gas generated by the pyrolysis of the biomass in the inner cavity of the cylinder (1) is discharged from the cylinder (1) through the exhaust pipe (8).

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