Biomass phenolic resin decomposition process and apparatus

Abstract

The application discloses a biomass phenolic resin decomposition process, and belongs to the field of biomass phenolic resin decomposition.S1, recovery: waste biomass phenolic resin is collected by recovery;S2, modification: long carbon chain methylene structure is introduced into the main chain and side chain of the phenolic resin by modification of the biomass raw material;S3, cleaning: the recovered biomass phenolic resin is cleaned in a cleaning machine;S4, crushing: the cleaned biomass phenolic resin is crushed in a crusher;S5, heating: the crushed biomass phenolic resin is heated and melted; the unmelted substance in S5 is put into a medium-temperature heating furnace for dissolving; then, the substance is flowed into a medium-temperature cracking furnace for decomposition, and liquid and gas are collected.The biomass phenolic resin decomposition process provided by the application has the beneficial effect of reducing energy consumption.

Description

Technical Field

[0001] This application relates to the field of biomass phenolic resin decomposition, and more specifically, to a biomass phenolic resin decomposition process. Background Technology

[0002] Phenolic resin, one of the three oldest thermosetting resins, was the first synthetic resin in the world to be industrially produced, with a history of nearly a century. Due to its excellent mechanical properties, heat resistance, chemical resistance, electrical insulation, molding processability, dimensional stability, flame retardancy, and low smoke emission, it has become an indispensable material in industry, widely used in friction braking materials for high-speed vehicles, ablation-resistant materials in aerospace, electronic packaging materials in electronics, flame-retardant insulation materials in construction and transportation, special adhesives for high-temperature environments, as well as coated sand, wood glue, insulation materials, refractory materials, and more than 20 other fields. Its performance improvement is related to people's quality of life and reflects the country's material manufacturing level.

[0003] The main reason why conventional phenolic resins are difficult to improve in terms of performance is their poor toughness, which stems from defects in their molecular structure. Their high proportion of rigid benzene rings / flexible alkane structures results in low elongation and high brittleness; simultaneously, it leads to a decomposition temperature exceeding 800℃, meaning that by the time they decompose, they are completely carbonized and cannot be degraded and recycled like other olefin resins. Current technologies involve heating and decomposing the resin during the recycling process.

[0004] In existing decomposition processes, the resin is not modified, resulting in high thermal decomposition bond energies and increased decomposition costs.

[0005] There is currently no low-cost biomass phenolic resin decomposition process. Summary of the Invention

[0006] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0007] In order to solve the technical problems mentioned in the background section above, some embodiments of this application provide a biomass phenolic resin decomposition process, S1, recycling: waste biomass phenolic resin is recycled and collected;

[0008] S2. Modification: By modifying biomass raw materials, long carbon chain methylene structures are reasonably introduced into the main chain and side chain of phenolic resin.

[0009] S3. Cleaning: Put the recycled biomass phenolic resin into the cleaning machine for cleaning;

[0010] S4. Crushing: Put the cleaned biomass phenolic resin into a crusher and crush it.

[0011] S5. Heating: The pulverized biomass phenolic resin is heated and melted;

[0012] Its features are:

[0013] The unmelted material in S5 is placed in a medium-temperature heating furnace for dissolution; then it flows into a medium-temperature pyrolysis furnace for decomposition, and the liquid and gas are collected.

[0014] Because the process of this application introduces long carbon chain methylene structures into the main chain and side chain of phenolic resin after recycling waste resin, the thermal cracking bond energy is reduced, thereby achieving low energy consumption.

[0015] Furthermore, the pyrolysis temperature of the pyrolysis furnace is 450℃-650℃.

[0016] Furthermore, the heating furnace includes:

[0017] The furnace body has a heating chamber for heating;

[0018] A rotating body is rotatably disposed on the inner wall of the heating chamber;

[0019] The feed inlet is located on the upper end face of the furnace body;

[0020] The material spreading component is located in the gap between the rotating body and the inner wall of the heating chamber;

[0021] The gas collection tank is located on the side of the furnace body and is connected to the rotating body through a gas pipe;

[0022] The liquid collection tank is located below the furnace body and is connected to the rotating body via a connecting pipe.

[0023] The rotating body forms a solution cavity; the solution cavity has an arc-shaped top; one end of the gas tube is inserted into the solution cavity, and the other end is connected to the gas collection tank.

[0024] The arc-shaped top is equipped with several air guides to guide the gas into the air pipe.

[0025] Furthermore, the air guide is formed by two inclined plates arranged in a V shape, with the larger ends of the two inclined plates pointing towards the air pipe;

[0026] The portion of each inclined plate away from the large end is inserted into the top wall of the arc top, so that the inclined plate is rotatably mounted on the arc top;

[0027] The inclined plate is connected to the top wall of the circular arc top by a torsion spring.

[0028] Furthermore, a connecting hole is formed at the center of the arc-shaped top;

[0029] The diameter of the docking hole is the same as the diameter of the trachea.

[0030] The docking hole is located at the opening of the solution cavity and forms an arc surface.

[0031] Furthermore, a discharge port is formed at the bottom of the solution chamber, and a portion of the discharge port extends axially to form a connecting pipe;

[0032] The connecting pipe is rotatably connected to the connecting pipe.

[0033] Furthermore, the side of the solution cavity near the bottom forms an arc surface;

[0034] Filter holes are formed on the arc surface, and the mesh size of the filter holes is smaller than that of the resin.

[0035] Furthermore, a plurality of stirring plates are fixedly provided on the outer wall of the rotating body;

[0036] The stirring plate is arc-shaped.

[0037] Furthermore, the material spreading assembly includes:

[0038] Several material spreading plates are stacked in layers, and there are gaps between adjacent material spreading plates;

[0039] Several circular arc rings are stacked on the outer wall of the rotating body, and each circular arc ring is staggered with the material spreading plate.

[0040] Furthermore, the arc-shaped ring portion is inserted between the two spreading plates.

[0041] The beneficial effect of this application is that it provides a specific low-energy-consumption and low-cost biomass phenolic resin decomposition process. Attached Figure Description

[0042] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0043] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0044] In the attached diagram:

[0045] Figure 1This is an overall schematic diagram based on an embodiment of this application;

[0046] Figure 2 This is a half-sectional view according to an embodiment of this application;

[0047] Figure 3 This is a structural schematic diagram of a part of the embodiment, mainly showing the rotating body structure;

[0048] Figure 4 This is a structural schematic diagram as part of an embodiment, mainly showing a half-sectional view of the furnace body;

[0049] Figure 5 This is a structural diagram of a part of the embodiment, mainly showing the structure of the air guide component;

[0050] Figure 6 This is a process flow diagram of this embodiment.

[0051] Figure label:

[0052] 100. Heating furnace;

[0053] 1. Hot furnace; 11. Heating chamber; 12. Heating plate;

[0054] 2. Rotating body; 21. Solution chamber; 211. Circular dome; 212. Docking hole; 213. Filter hole;

[0055] 3. Air guide components; 31. Inclined plate;

[0056] 4. Gas collection tank;

[0057] 5. Liquid collection tank;

[0058] 6. Stirring plate;

[0059] 7. Spreading plate; 71. Circular arc ring; Detailed Implementation

[0060] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0061] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0062] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0063] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0064] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0065] Example 1

[0066] A biomass phenolic resin decomposition process includes the following steps:

[0067] S1. Recycling: Collecting and recycling waste biomass phenolic resin;

[0068] S2. Modification: By modifying biomass raw materials, long-chain methylene structures are rationally introduced into the main chain and side chains of phenolic resin.

[0069] S3. Cleaning: Put the recycled biomass phenolic resin into the cleaning machine for cleaning;

[0070] S4. Crushing: Put the cleaned biomass phenolic resin into a crusher and crush it.

[0071] S5. Heating: The pulverized biomass phenolic resin is heated and melted;

[0072] The unmelted material in S5 is placed in a medium-temperature heating furnace for dissolution; then it flows into a medium-temperature pyrolysis furnace for decomposition, collecting the liquid and gas; more specifically, the temperature of the pyrolysis furnace is 450℃-650℃.

[0073] Example 2

[0074] The equipment for decomposing biomass phenolic resin is characterized by:

[0075] The heating furnace 1100 includes: furnace body, rotating body 2, air guide 3, and material spreading assembly;

[0076] The furnace body has a cylindrical heating cavity 11 for heating, and a heating plate 12 is embedded in the inner wall of the heating cavity 11 for heating the furnace body; the heating plate 12 is a commercially available heating plate 12, which is existing technology and will not be described in detail in this embodiment.

[0077] The rotating body 2 is rotatably disposed within the heating chamber 11, and there is a gap between the outer wall of the rotating body 2 and the inner wall of the heating chamber 11. More specifically, the inner wall of the heating chamber 11 forms a rotating groove, which is circular. The side wall portion of the rotating body 2 is inserted into the rotating groove so that the rotating body 2 rotates within the heating chamber 11. A toothed ring is provided on the upper surface of the rotating body 2, and a motor is provided at the upper end of the furnace body. The output end of the motor is provided with a gear that meshes with the toothed ring so that the motor can drive the rotating body 2 to rotate. In this embodiment, the use of a motor to drive the rotating body 2 to rotate is existing technology, and the installation of the toothed ring and the motor... The mounting position can be changed according to the actual situation, which will not be described in detail in this embodiment; more specifically, the rotating body 2 forms a solution cavity 21, and the upper end of the solution cavity 21 forms an arc top 211. The docking hole 212 is located at the center of the arc top 211 and forms an arc surface at the opening of the solution cavity 21; due to the arc top 211, the gas generated when dissolving the resin can move towards the center of the arc top 211 and enter the docking hole 212; the arc surface of the arc top 211 plays a guiding role for the gas;

[0078] More specifically, several air guides 3 are provided on the arc-shaped top 211. Each air guide 3 consists of two inclined plates 31 arranged in a V-shape, with the larger ends of the two inclined plates 31 pointing towards the docking hole 212. The portion of each inclined plate 31 furthest from its larger end is inserted into the top wall of the arc-shaped top 211, allowing the inclined plate 31 to be rotatably mounted on the arc-shaped top 211. The connection between the inclined plate 31 and the top wall of the arc-shaped top 211 is made by a torsion spring. When the gas rises to the arc-shaped top 211, it comes into contact with the air guides 3. The airflow then causes the two inclined plates 31 to vibrate. Due to the inclined plates 31, the contact area between the gas and the solid increases after the gas contacts the inclined plates 31, thus allowing the liquid in the gas to adhere to the inclined plates 31. This improves the stability of the recovered gas and solution. Because of the torsion spring, when the gas contacts the inclined plates 31, it causes the inclined plates 31 to vibrate, thereby shaking off the liquid on the inclined plates 31.

[0079] The gas collecting tank 4 is located on the side of the furnace body and is used to collect gas. The gas collecting tank 4 and the solution chamber 21 are connected by a gas pipe. More specifically, one end of the gas pipe is inserted into the docking hole 212, and the end of the gas pipe inserted into the docking hole 212 has a rotating head that can be rotatably docked with the docking hole 212, so that the rotating body 2 can rotate relative to the gas pipe. The other end of the gas pipe is connected to the gas collecting tank 4, so that the gas in the docking hole 212 enters the gas collecting tank 4. In this way, the gas is collected by dissolving.

[0080] The liquid collection tank 5 is located below the furnace body and is used to collect the solution of the melted resin. More specifically, the bottom of the solution chamber 21 forms a discharge port, and part of the discharge port extends axially to form a connecting pipe. The connecting pipe is rotatably connected to the connecting pipe. After the solution chamber 21 is filled with solution, it will be discharged from the discharge port into the connecting pipe, thus realizing the collection of solution.

[0081] More specifically, the side of the solution chamber 21 near the bottom forms an arc surface; filter holes 213 are opened on the arc surface, the mesh size of the filter holes 213 is smaller than the mesh size of the resin; several stirring plates 6 are fixed on the outer wall of the rotating body 2, the stirring plates 6 are arc-shaped; when the motor drives the rotating body to rotate, the stirring plates 6 will stir the melting resin, thereby improving the melting efficiency; at the same time, the melted liquid will enter the solution chamber 21 through the filter holes 213, preventing unmelted resin from entering the collection tank 5, further improving the quality of the collected liquid.

[0082] More specifically, the material spreading assembly includes: several spreading plates 7, which are stacked and have gaps between adjacent spreading plates 7; several arc rings 71, which are stacked on the outer wall of the rotating body 2, and each arc ring 71 is staggered with the spreading plates; the arc rings are inserted between two spreading plates 7; after the resin enters from the inlet 70, it will come into contact with the spreading plates 7 and then fall onto the arc rings 71. Since the rotating body is rotating, the resin will be evenly spread onto the heating chamber 11 after falling onto the arc rings, which improves the uniformity of melting.

[0083] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A biomass phenolic resin decomposition process, comprising the following steps: S1, recycling: collecting waste biomass phenolic resin; S2, modification: introducing long carbon chain methylene structure into the main chain and side chain of the phenolic resin by modifying the biomass raw material; S3, cleaning: cleaning the recycled biomass phenolic resin in a cleaning machine; S4, crushing: crushing the cleaned biomass phenolic resin in a crusher; S5, heating: heating and melting the crushed biomass phenolic resin; characterized in that: the unmelted material in S5 is put into a medium-temperature heating furnace for dissolution, and then flows into a medium-temperature cracking furnace for decomposition, and the liquid and gas are collected; the cracking temperature of the cracking furnace is 450-650℃; the heating furnace comprises: a furnace body having a heating cavity for heating; a rotating body rotatably arranged on the inner wall of the heating cavity; a feeding port arranged on the upper end surface of the furnace body; a material scattering assembly arranged in the gap between the rotating body and the inner wall of the heating cavity; a gas collecting tank located on the side of the furnace body and connected with the rotating body through a gas pipe; a liquid collecting tank located below the furnace body and connected with the rotating body through a connecting pipe; wherein the rotating body forms a solution cavity; the solution cavity forms a circular arc top, one end of the gas pipe is inserted into the solution cavity, and the other end is connected with the gas collecting tank; the circular arc top is provided with a plurality of air guide pieces for guiding the gas into the gas pipe; the air guide pieces are in V shape formed by two inclined plates, and the large ends of the two inclined plates point to the gas pipe; one end of each of the inclined plates away from the large end is partially inserted into the top wall of the circular arc top, so that the inclined plates are rotatably arranged on the circular arc top; the connection between the inclined plate and the top wall of the circular arc top is connected by a torsional spring. 2.A biomass phenolic resin decomposition device applied to the biomass phenolic resin decomposition process of claim 1, characterized in that: a butt joint hole is formed in the center of the circular arc top; the diameter of the butt joint hole is the same as that of the gas pipe; wherein the butt joint hole forms a circular arc surface at the orifice of the solution cavity. 3.The biomass phenolic resin decomposition device of claim 2, characterized in that: the bottom of the solution cavity forms a discharge port, and the discharge port partially extends axially to form a butt joint pipe; the butt joint pipe is rotatably connected with the connecting pipe. 4.The biomass phenolic resin decomposition device of claim 2, characterized in that: the side of the solution cavity close to the bottom forms a circular arc surface; a plurality of filter holes are formed on the circular arc surface, and the mesh number of the filter holes is smaller than that of the resin. 5.The biomass phenolic resin decomposition device of claim 2, characterized in that: a plurality of stirring plates are fixedly arranged on the outer wall of the rotating body; the stirring plates are in circular arc shape. 6.The biomass phenolic resin decomposition device of claim 2, characterized in that: the material scattering assembly comprises: a plurality of material scattering plates, the material scattering plates are stacked and distributed, and there is a gap between adjacent material scattering plates; a plurality of circular arc rings are stacked and distributed on the outer wall of the rotating body, and each circular arc ring is staggered with the material scattering plates.

7. The apparatus for biomass phenolic resin decomposition according to claim 6, characterized by: the circular arc ring is partially inserted between two material scattering plates.

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