A temperature-controlled pyrolysis device and method for shielding microwave non-thermal effects

Abstract

The present invention discloses a temperature-controlled pyrolysis device and method for shielding microwave non-thermal effects. By wrapping a reflective layer and a temperature-regulating layer outside the pyrolysis reactor, nesting the pyrolysis reactor in a sleeve made of silicon carbide, using aluminum silicate fiber filler for the temperature-regulating layer, and copper foil for the reflective layer, the device utilizes the microwave absorption and heat generation characteristics of silicon carbide, the heat insulation characteristics of aluminum silicate fiber, and the microwave shielding characteristics of copper foil to achieve temperature-controlled rapid heating with shielding of microwave non-thermal effects. In addition, the present application provides a temperature-controlled pyrolysis method for shielding microwave non-thermal effects, which can be used to determine the existence of microwave non-thermal effects and the impact of microwave non-thermal effects on pyrolysis reactions.

Description

Technical Field

[0001] The present invention belongs to the technical field of microwave pyrolysis, and particularly relates to a temperature-controlled pyrolysis device and method for shielding microwave non-thermal effects. Background Art

[0002] The non-thermal effect of microwave refers to other effects except the thermal effect, such as electrical effect, magnetic effect and chemical effect, etc.

[0003] Microwave pyrolysis is a clean and efficient pyrolysis method. The pyrolysis raw material absorbs microwave energy and is directly converted into heat energy, which has the advantages of uniform heating, fast pyrolysis speed, small heat loss, easy operation and control, etc., and has attracted the attention of many scientific and technological workers; however, the microwave non-thermal effect is a special effect that cannot explain the experimental phenomena with temperature changes, which may have unknown effects on the pyrolysis reaction, resulting in the inability to accurately evaluate the characteristics of the pyrolysis reaction products. Summary of the Invention

[0004] The purpose of the present invention is to provide a temperature-controlled pyrolysis device and method for shielding microwave non-thermal effects, so as to overcome the influence of the microwave non-thermal effect in the prior art on the pyrolysis reaction.

[0005] A temperature-controlled pyrolysis device for shielding microwave non-thermal effects includes a pyrolysis reactor, a reflection layer is wrapped outside the pyrolysis reactor, a temperature adjustment layer is wrapped outside the reflection layer, a sleeve is arranged outside the temperature adjustment layer, and the pyrolysis reactor is nested in the sleeve.

[0006] Further, the sleeve is a single-port sleeve.

[0007] Further, the sleeve is made of silicon carbide material.

[0008] Further, the wall thickness of the sleeve is 3 - 10 mm.

[0009] Further, the reflection layer is copper foil.

[0010] Further, the temperature adjustment layer uses a silicon aluminum fiber filler.

[0011] Further, the pyrolysis reactor uses a quartz tube reactor.

[0012] Further, the reflection layer and the temperature adjustment layer have the same length as the pyrolysis reactor.

[0013] A temperature-controlled pyrolysis method for shielding microwave non-thermal effects includes the following steps;

[0014] S1, after wrapping a reflection layer outside the pyrolysis reactor and wrapping a temperature adjustment layer outside the reflection layer, nest the pyrolysis reactor into the sleeve;

[0015] S2. Place the product to be pyrolyzed into the pyrolysis reactor, and use microwaves to heat the sleeve to complete the temperature-controlled pyrolysis reaction that shields the non-thermal effect of microwaves.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects:

[0017] A temperature-controlled pyrolysis device for shielding the non-thermal effect of microwaves according to the present invention wraps a reflective layer outside the pyrolysis reactor. After wrapping a temperature-regulating layer outside the reflective layer, it is nested in the outermost sleeve. Utilizing the microwave-absorbing and heat-generating characteristics of the outer sleeve, and shielding or reflecting the unabsorbed microwaves through the reflective layer. Finally, the temperature-changing speed is controlled by the temperature-regulating layer between the reflective layer and the sleeve to prevent the pyrolysis reaction from being affected by too rapid temperature rise. This structure realizes shielding the influence of the non-thermal effect of microwaves on the pyrolysis reaction when using microwave heating for pyrolysis reaction. At the same time, nesting the pyrolysis reactor in the sleeve is convenient for operation and facilitates the replacement of the structural components of the device.

[0018] In addition, the scope of application of this device is relatively wide, and it is applicable not only to existing drying, desulfurization, and garbage pyrolysis, but also to temperature-controlled rapid pyrolysis of low-rank coal, biomass, oil shale, sludge, etc.

[0019] A temperature-controlled pyrolysis method for shielding the non-thermal effect of microwaves according to the present invention wraps a reflective layer outside the pyrolysis reactor. After wrapping a temperature-regulating layer outside the reflective layer, nest the pyrolysis reactor into the sleeve, then place the reactants into the pyrolysis reactor, and use microwaves to heat the sleeve to complete the temperature-controlled pyrolysis reaction that shields the non-thermal effect of microwaves, achieving the purpose of controlling the heating temperature and completely separating the non-thermal effect from microwave heating.

[0020] In addition, this method can also be used to judge whether the non-thermal effect exists and observe the influence of the non-thermal effect of microwaves on the pyrolysis reaction by comparing the differences in the reaction products of microwave heating under the specified application conditions. Description of the Drawings

[0021] Figure 1 It is a structural diagram of the temperature-controlled pyrolysis device for shielding the non-thermal effect of microwaves in the embodiment of the present invention.

[0022] In the figure, 1. Sleeve; 2. Temperature-regulating layer; 3. Reflective layer; 4. Pyrolysis reactor. Detailed Embodiments

[0023] To enable those skilled in the art to better understand the solution of the present invention, the following will clearly and completely describe the technical solution in the embodiments of the present invention 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0024] As Figure 1 shown, a temperature-controlled pyrolysis device for shielding microwave non-thermal effects includes a pyrolysis reactor 4 and a sleeve 1. A temperature adjustment layer 2 and a reflection layer 3 are provided between the pyrolysis reactor 4 and the sleeve 1. The reflection layer 3 is wrapped outside the pyrolysis reactor 4, and the temperature adjustment layer 2 is wrapped outside the reflection layer 3. After the pyrolysis reactor 4 wraps the reflection layer 3 and the temperature adjustment layer 2, it is nested in the sleeve 1.

[0025] Specifically, the sleeve 1 is a cylindrical single-port sleeve made of silicon carbide. The pyrolysis reactor 4 uses a quartz tube reactor, and the reflection layer 3 uses copper foil. The temperature adjustment layer 2 outside the copper foil uses a silica-aluminum fiber filler. The purpose of using silicon carbide material for the sleeve 1 is to utilize the microwave absorption and heat generation characteristics of silicon carbide. When using microwave heating, the silicon carbide single-port sleeve absorbs most of the microwave energy and converts the microwave into heat to achieve rapid heating; utilize the heat insulation characteristics of the silica-aluminum fiber filler between the silicon carbide single-port sleeve and the copper foil to isolate the heat transfer and achieve the temperature control function through its material thickness to prevent the rapid temperature rise of the pyrolysis reactor 4; the copper foil shields / reflects the remaining microwave energy that is not absorbed by the silicon carbide due to external factors such as the quality problem of the sleeve 1, realizing the complete shielding of microwaves.

[0026] As Figure 1 shown, the quartz tube reactor, copper foil, and silica-aluminum fiber filler can be nested in the silicon carbide single-port sleeve in an integrated structure. The wall thickness of the silicon carbide single-port sleeve needs to be designed to be 3 - 10 mm according to the microwave frequency. The length and inner diameter of the sleeve 1 can be set according to the quartz tube reactor; the silica-aluminum fiber filler is wrapped and filled, and the wrapping thickness is set according to the temperature control requirements. The length and outer diameter of the quartz tube reactor are set according to the heating conditions.

[0027] The present invention provides a temperature-controlled pyrolysis method for shielding microwave non-thermal effects. First, after wrapping the outside of the pyrolysis reactor with a reflection layer and a temperature adjustment layer, the pyrolysis reactor is nested into the sleeve, then the product to be pyrolyzed is placed in the pyrolysis reactor, and finally the sleeve is heated by microwave to complete the temperature-controlled pyrolysis reaction for shielding microwave non-thermal effects.

[0028] Embodiment

[0029] The wall thickness of the single-port silicon carbide sleeve of this device is 10 mm, the sleeve length is 600 mm, and the inner diameter is 70 mm; the wrapping thickness of the aluminosilicate fiber filler is 5 mm; the length of the quartz tube reactor is 600 mm, and the outer diameter is 60 mm. After wrapping the quartz tube reactor with copper foil and aluminosilicate fiber filler, it is inserted into the single-port silicon carbide sleeve without additional fixation, and a temperature-controlled rapid pyrolysis reaction is carried out at a microwave frequency of 2.45 GHz and a microwave power of 800 W. The presence of non-thermal effects can also be judged by comparing the differences in the microwave heating reaction products, and the influence of microwave non-thermal effects on the pyrolysis reaction can be observed.

[0030] When using this device for pyrolysis reaction, a conventional control group can also be set up to judge the presence of microwave non-thermal effects and the influence of microwave non-thermal effects on the experimental results according to the experimental results.

[0031] As mentioned above, only the preferred specific implementation mode of the present invention is described, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention.

Claims

1. A temperature-controlled pyrolysis device for shielding microwave non-thermal effects, characterized in that, It includes a pyrolysis reactor (4), the outside of the pyrolysis reactor (4) is wrapped with a reflective layer (3), the outside of the reflective layer (3) is wrapped with a temperature control layer (2), and a sleeve (1) is arranged outside the temperature control layer (2), and the pyrolysis reactor (4) is nested in the sleeve (1); The sleeve (1) is made of silicon carbide, and the wall thickness of the sleeve (1) is 3-10 mm; The reflective layer (3) is a copper foil; The temperature control layer (2) uses a silicon aluminum fiber filler.

2. The temperature-controlled pyrolysis device for shielding microwave non-thermal effects according to claim 1, wherein, The sleeve (1) is a single-port sleeve.

3. A temperature-controlled pyrolysis device for shielding microwave non-thermal effects according to claim 1, characterized in that, The pyrolysis reactor (4) uses a quartz tube reactor.

4. The temperature-controlled pyrolysis device for shielding microwave non-thermal effects according to claim 1, characterized in that, The reflective layer (3) and the temperature control layer (2) have the same length as the pyrolysis reactor (4).

5. A method for controlling temperature pyrolysis to shield the non-thermal effect of microwaves of the temperature-controlled pyrolysis device for shielding the non-thermal effect of microwaves according to claim 1, characterized in that, It includes the following steps; S1. After wrapping a reflective layer outside the pyrolysis reactor and wrapping a temperature control layer outside the reflective layer, nest the pyrolysis reactor into the sleeve; S2. Put the product to be pyrolyzed into the pyrolysis reactor, and use microwaves to heat the sleeve to complete the temperature-controlled pyrolysis reaction that shields the non-thermal effect of microwaves.

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