Acetic acid sheet processing technology

Abstract

The present invention relates to the technical field related to the processing of acetic acid plates, specifically to the processing technology of acetic acid plates. The processing technology of acetic acid plates includes a cellulose preparation process, a cellulose dissolution process, a cellulose regeneration process, a cellulose fibrillation process, and a fiberboard forming process. In the cellulose preparation process, wood with a certain cellulose content and cellulose quality is selected as the raw material, and the raw material is cut, ground, and screened. Then, the screened material is added into a reaction kettle. The reaction kettle includes a kettle body, a rotating shaft, stirring blades, and an acid supply pipeline; by setting up a reaction kettle composed of a combination of a kettle body, a rotating shaft, stirring blades, and an acid supply pipeline, a main liquid cavity is opened on the rotating shaft, a secondary liquid cavity is opened on the stirring rod on the side wall of the rotating shaft, and a liquid outlet hole is opened on the secondary liquid cavity, so that acetic acid liquid can be directly and evenly transported into the kettle body, thereby improving the distribution speed of acetic acid and ensuring the reaction effect.

Description

Technical Field

[0001] The present invention relates to the technical field related to the processing of acetate sheets, and specifically to the processing technology of acetate sheets. Background Art

[0002] Acetate sheet is a common building material, and its main component is cellulose acetate; cellulose acetate is a synthetic material composed of cellulose and acetate ester. Cellulose is the main component of plant cell walls, and acetate ester is a product obtained by reacting cellulose with acetic acid.

[0003] The production process of acetate sheets usually involves mixing cellulose raw materials with acetic acid solution and undergoing a series of chemical reactions and processing technologies to finally form cellulose acetate. This material has good physical properties and chemical stability, and also has certain waterproof and corrosion resistance properties;

[0004] However, the internal structure of the traditional reaction kettle for processing cellulose acetate is relatively simple. Due to the continuous reaction of cellulose raw materials with acetic acid, the acetic acid concentration inside the reaction kettle will gradually decrease, thereby affecting the reaction efficiency of cellulose raw materials with acetic acid. And the traditional method for supplementing acetic acid in the reaction kettle is to directly pour acetic acid from the feeding port, resulting in a longer stirring time required to evenly distribute acetic acid, thus affecting the reaction effect of the reaction kettle on cellulose. Therefore, the present invention proposes a processing technology for acetate sheets to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a processing technology for acetate sheets to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A processing technology for acetate sheets, the processing technology for acetate sheets includes:

[0007] Cellulose preparation process, in the cellulose preparation process, by selecting wood with a certain cellulose content and cellulose quality as raw materials, cutting, grinding, and screening the raw materials, and then adding the screened materials into the reaction kettle;

[0008] Cellulose dissolution process, in the cellulose dissolution process, adding an appropriate amount of acetic acid into the reaction kettle, and fully dissolving the raw materials by heating and stirring to form a cellulose solution;

[0009] Cellulose regeneration process, the cellulose regeneration process includes an acid-base neutralization process, a filtration and washing process, and a regenerated cellulose process to process the cellulose solution to obtain regenerated cellulose;

[0010] A cellulose fibrillation process, in which regenerated cellulose is subjected to a fibrillation treatment to convert it into a fibrous material;

[0011] The fiberboard forming process comprises the following steps: the fiberized cellulose is formed through a forming machine to form acetate boards of different specifications and sizes.

[0012] Preferably, in the acid-base neutralization process, an appropriate amount of alkaline substance is added to the cellulose solution to neutralize the acetic acid in the cellulose solution. In the filtering and washing process, the neutralized cellulose solution is filtered and washed through a filtering device to remove impurities and residual acetic acid. In the cellulose regeneration process, the filtered and washed cellulose solution is dried to evaporate the water in the solution to obtain pure regenerated cellulose.

[0013] Preferably, the reactor comprises:

[0014] A kettle body, wherein the lower end of the kettle body is fixedly connected with a supporting leg, a motor bracket is fixedly mounted on the supporting leg, a driving motor is fixedly mounted on the motor bracket, and a material return port is opened on the bottom surface of the kettle body, a material return port valve is arranged at the port of the material return port, a rotating shaft bracket is fixedly mounted at the upper end of the inner cavity of the kettle body, a cover body is arranged on the upper side of the kettle body, a material feed port is arranged on the cover body, and a material feed port valve is arranged at the port of the material feed port;

[0015] A rotating shaft, the rotating shaft is rotatably mounted between the bottom surface of the kettle body and the rotating shaft bracket through a sealed bearing, a main liquid cavity is opened at the lower end of the rotating shaft, a stirring rod is fixedly connected to the side wall of the rotating shaft, a secondary liquid cavity is opened on the stirring rod, the secondary liquid cavity is connected to the main liquid cavity, and a liquid outlet is opened on the side wall of the secondary liquid cavity;

[0016] A stirring blade, wherein the stirring blade is integrally formed with the rotating shaft;

[0017] The acid supply pipeline is connected to the main liquid chamber, and the other end of the acid supply pipeline is connected to the acetic acid feeding equipment.

[0018] Preferably, a primary pulley is fixedly mounted on the output shaft of the driving motor, a secondary pulley is fixedly mounted on the lower side end of the rotating shaft, and the primary pulley and the secondary pulley are connected to each other via a transmission belt.

[0019] Preferably, a mechanical seal is installed at the port position of the main liquid chamber, the acid supply pipeline is connected to the inner ring of the mechanical seal, and the acid supply pipeline is positioned on the bottom surface of the kettle body through a pipeline support.

[0020] Preferably, a piston chamber is provided at the port position of the liquid outlet hole, a threaded hole is provided at the port position of the piston chamber, a backflow prevention member is arranged in the piston chamber, a fastening member is installed in the threaded hole, the backflow prevention member is limited by the fastening member, and an internal hexagonal wrench groove is provided on the outer end face of the fastening member, and a push rod hole is provided at the bottom surface of the internal hexagonal wrench groove.

[0021] Preferably, the backflow prevention member is composed of a combination of a piston, a push rod and a return spring. The piston and the push rod are integrally formed, and a main flow channel is provided on the piston and the push rod. Secondary flow channels are provided on the side wall of the main flow channel. The main flow channel does not penetrate through the push rod. The piston is movably arranged in the piston chamber, and the push rod is movably arranged in the push rod hole. The return spring is sleeved on the push rod, and the two ends of the return spring respectively abut against the piston and the fastening member.

[0022] Preferably, a sealing washer is provided at the bottom of the threaded hole, a sealing groove is provided on the side wall of the secondary flow channel, a rubber sealing ring is embedded in the sealing groove, and when the backflow prevention member and the fastening member are actually installed, the sealing washer and the rubber sealing ring are both in a compressed state.

[0023] Preferably, a retaining ring is integrally formed on the side wall of the piston chamber. When the return spring is in the reset state, the piston abuts against the retaining ring, and at this time, the secondary flow channel is located inside the rubber sealing ring.

[0024] Preferably, all the structures on the reaction kettle are made of acid-resistant materials.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. By providing a reaction kettle composed of a kettle body, a rotating shaft, stirring blades and an acid supply pipe, a main liquid chamber is provided on the rotating shaft, secondary liquid chambers are provided on the stirring rods on the side wall of the rotating shaft, and liquid outlet holes are provided on the secondary liquid chambers, so that acetic acid liquid can be directly and evenly transported into the kettle body, thereby improving the uniform distribution speed of acetic acid and ensuring the reaction effect;

[0027] 2. And by arranging a backflow prevention member composed of a combination of a piston, a push rod and a return spring in the piston chamber at the port position of the liquid outlet hole, the liquid inside the kettle body can be effectively prevented from flowing back, thereby effectively avoiding the pollution of the flow channels and the liquid chambers. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of the present invention;

[0029] Figure 2 is Figure 1 a schematic enlarged view of the structure at A in

[0030] Figure 3 Schematic diagram of the internal structure of the kettle body of the present invention;

[0031] Figure 4 Half-sectional view of the stirring rod of the present invention;

[0032] Figure 5 is Figure 4 Enlarged schematic diagram of the structure at position B in

[0033] Figure 6 is Figure 4 Enlarged schematic diagram of the structure at position C in

[0034] Figure 7 is Figure 6 Enlarged schematic diagram of the structure at position D in

[0035] Figure 8 is Figure 6 Enlarged schematic diagram of the structure at position E in

[0036] Figure 9 Half-sectional view of the rotating shaft of the present invention;

[0037] Figure 10 is Figure 9 Enlarged schematic diagram of the structure at position F in

[0038] In the figure: kettle body 1, rotating shaft 2, stirring blade 3, acid supply pipe 4, rotating shaft bracket 5, support leg 6, motor bracket 7, driving motor 8, primary pulley 9, secondary pulley 10, transmission belt 11, discharging port 12, cover body 13, feeding port 14, stirring rod 15, main liquid chamber 16, secondary liquid chamber 17, liquid outlet hole 18, mechanical seal 19, pipe bracket 20, piston chamber 21, threaded hole 22, anti-backflow part 23, fastener 24, piston 25, ejector rod 26, return spring 27, main flow channel 28, secondary flow channel 29, rubber sealing ring 30, sealing washer 31, retaining ring 32. Specific embodiments

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] Please refer to Figure 1-10 , the present invention provides embodiments of the following five preferred solutions

[0041] Embodiment 1

[0042] Acetic acid sheet processing process, the acetic acid sheet processing process includes:

[0043] Cellulose preparation process. During the cellulose preparation process, wood with a certain cellulose content and cellulose quality is selected as the raw material, and the raw material is cut, ground, and screened. Then, the screened material is added into the reaction kettle.

[0044] Cellulose dissolution process. During the cellulose dissolution process, an appropriate amount of acetic acid is added into the reaction kettle, and the raw material is fully dissolved through heating and stirring to form a cellulose solution.

[0045] Cellulose regeneration process. The cellulose regeneration process includes an acid-base neutralization process, a filtration and washing process, and a regenerated cellulose process to process the cellulose solution to obtain regenerated cellulose.

[0046] Cellulose fibrillation process. During the cellulose fibrillation process, the regenerated cellulose is fibrillated to convert it into a fibrous substance.

[0047] Fiberboard forming process. During the fiberboard forming process, the fibrillated cellulose is formed by a forming machine to make acetic acid sheets of different specifications and sizes.

[0048] During the acid-base neutralization process, an appropriate amount of alkaline substance is added to the cellulose solution to neutralize the acetic acid in the cellulose solution. During the filtration and washing process, the neutralized cellulose solution is filtered and washed through a filtration device to remove impurities and residual acetic acid. During the regenerated cellulose process, the filtered and washed cellulose solution is dried to evaporate the water in the solution to obtain pure regenerated cellulose.

[0049] Example 2

[0050] On the basis of Example 1, the reaction kettle includes a kettle body 1, a rotating shaft 2, stirring blades 3, and an acid supply pipe 4. The lower end of the kettle body 1 is fixedly connected with support legs 6. A motor bracket 7 is fixedly installed on the support legs 6, and a driving motor 8 is fixedly installed on the motor bracket 7. A discharge port 12 is opened on the bottom surface of the kettle body 1, and a discharge port valve is arranged at the port of the discharge port 12. A rotating shaft bracket 5 is fixedly installed at the upper end of the inner cavity of the kettle body 1. A cover body 13 is arranged on the upper side of the kettle body 1, and a feed port 14 is arranged on the cover body 13. A feed port valve is arranged at the port of the feed port 14. The rotating shaft 2 is rotatably installed between the bottom surface of the kettle body 1 and the rotating shaft bracket 5 through a sealed bearing. A main liquid cavity 16 is opened at the lower end of the rotating shaft 2. A stirring rod 15 is fixedly connected to the side wall of the rotating shaft 2. A secondary liquid cavity 17 is opened on the stirring rod 15. The secondary liquid cavity 17 is communicated with the main liquid cavity 16. Liquid outlet holes 18 are opened on the side wall of the secondary liquid cavity 17. The stirring blades 3 are integrally formed with the rotating shaft 2. The acid supply pipe 4 is communicated with the main liquid cavity 16, and the other end of the acid supply pipe 4 is connected to an acetic acid feeding device.

[0051] A primary pulley 9 is fixedly installed on the output shaft of the drive motor 8, and a secondary pulley 10 is fixedly installed at the lower end of the rotating shaft 2. The primary pulley 9 and the secondary pulley 10 are drivingly connected by a transmission belt 11.

[0052] A mechanical seal 19 is installed at the port position of the main liquid chamber 16. The acid supply pipe 4 is connected to the inner ring of the mechanical seal 19, and the acid supply pipe 4 is positioned at the bottom surface of the kettle body 1 through a pipe support 20. By providing a reaction kettle composed of the kettle body 1, the rotating shaft 2, the stirring blades 3 and the acid supply pipe 4, a main liquid chamber 16 is opened on the rotating shaft 2, a secondary liquid chamber 17 is opened on the stirring rod 15 on the side wall of the rotating shaft 2, and a liquid outlet hole 18 is opened on the secondary liquid chamber 17, so that the acetic acid liquid can be directly and evenly transported into the kettle body 1, thereby improving the uniform distribution speed of acetic acid and ensuring the reaction effect.

[0053] Example Three

[0054] On the basis of Example Two, a piston chamber 21 is opened at the port position of the liquid outlet hole 18, a threaded hole 22 is opened at the port position of the piston chamber 21, an anti-backflow member 23 is arranged in the piston chamber 21, a fastener 24 is installed in the threaded hole 22, the anti-backflow member 23 is limited by the fastener 24, and an internal hexagonal wrench groove is opened on the outer end surface of the fastener 24, and a push rod hole is opened at the bottom surface of the internal hexagonal wrench groove.

[0055] The anti-backflow member 23 is composed of a piston 25, a push rod 26 and a return spring 27. The piston 25 and the push rod 26 are integrally formed, and a main flow channel 28 is opened on the piston 25 and the push rod 26. A secondary flow channel 29 is opened on the side wall of the main flow channel 28. The main flow channel 28 does not penetrate through the push rod 26. The piston 25 is movably arranged in the piston chamber 21, and the push rod 26 is movably arranged in the push rod hole. The return spring 27 is sleeved on the push rod 26, and the two ends of the return spring 27 are respectively abutted against the piston 25 and the fastener 24. By arranging the anti-backflow member 23 composed of the piston 25, the push rod 26 and the return spring 27 in the piston chamber 21 at the port position of the liquid outlet hole 18, the liquid inside the kettle body 1 can be effectively prevented from flowing back, and the pollution of the flow channel and the liquid chamber can be effectively avoided.

[0056] Example Four

[0057] On the basis of Example Three, a sealing gasket 31 is provided at the bottom of the groove of the threaded hole 22, a sealing groove is opened on the side wall of the secondary flow channel 29, and a rubber sealing ring 30 is embedded in the sealing groove. When the anti-backflow member 23 and the fastener 24 are actually installed, the sealing gasket 31 and the rubber sealing ring 30 are both in a compressed state. By providing the sealing gasket 31 and the rubber sealing ring 30, the sealing performance can be further ensured, so as to avoid the occurrence of the reaction liquid flowing back.

[0058] Example Five

[0059] On the basis of Example Four, a retaining ring 32 is integrally formed on the side wall of the piston cavity 21. When the return spring 27 is in the return state, the piston 25 abuts against the retaining ring 32. At this time, the secondary flow channel 29 is located inside the rubber sealing ring 30. Through the limiting effect of the retaining ring 32, the initial contact area between the piston 25 and the gas can be effectively guaranteed, so as to ensure the pushing effect on the piston 25.

[0060] All the structures on the reaction kettle are made of acid-resistant materials.

[0061] Although the above description of the illustrative specific embodiments of the present application is made to enable those skilled in the art to understand the present application, the present application is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present application defined and determined by the appended claims, all the application creations using the concept of the present application are within the scope of protection.

Claims

1. The processing technology of acetate sheet, characterized in that: The acetic acid sheet processing process includes: A cellulose preparation process. In this cellulose preparation process, wood with a certain cellulose content and cellulose quality is selected as the raw material, and the raw material is cut, ground, and screened. Then, the screened material is added into the reaction kettle. A cellulose dissolution process. In this cellulose dissolution process, an appropriate amount of acetic acid is added into the reaction kettle, and the raw material is fully dissolved by heating and stirring to form a cellulose solution. A cellulose regeneration process. This cellulose regeneration process includes an acid-base neutralization process, a filtration and washing process, and a regenerated cellulose process to process the cellulose solution to obtain regenerated cellulose. A cellulose fibrillation process. In this cellulose fibrillation process, the regenerated cellulose is fibrillated to convert it into a fibrous substance. A fiber board forming process. In this fiber board forming process, the fibrillated cellulose is formed by a forming machine to make acetic acid sheets of different specifications and sizes. The reaction kettle includes: A kettle body (1). A support leg (6) is fixedly connected to the lower end of the kettle body (1). A motor bracket (7) is fixedly installed on the support leg (6). A driving motor (8) is fixedly installed on the motor bracket (7). A discharge port (12) is opened on the bottom surface of the kettle body (1). A discharge port valve is arranged at the port of the discharge port (12). A rotating shaft bracket (5) is fixedly installed near the upper end of the inner cavity of the kettle body (1). A cover body (13) is arranged on the upper side of the kettle body (1). An inlet port (14) is arranged on the cover body (13). An inlet port valve is arranged at the port of the inlet port (14). A rotating shaft (2). The rotating shaft (2) is rotatably installed between the bottom surface of the kettle body (1) and the rotating shaft bracket (5) through a sealed bearing. A main liquid cavity (16) is opened at the lower end of the rotating shaft (2). A stirring rod (15) is fixedly connected to the side wall of the rotating shaft (2). A secondary liquid cavity (17) is opened on the stirring rod (15). The secondary liquid cavity (17) is communicated with the main liquid cavity (16). Liquid outlet holes (18) are opened on the side wall of the secondary liquid cavity (17). Stirring blades (3). The stirring blades (3) are integrally formed with the rotating shaft (2). An acid supply pipe (4). The acid supply pipe (4) is communicated with the main liquid cavity (16), and the other end of the acid supply pipe (4) is connected to an acetic acid feeding device.

2. The acetic acid sheet processing process according to claim 1, characterized in that: In the acid-base neutralization process, an appropriate amount of alkaline substance is added to the cellulose solution to neutralize the acetic acid in the cellulose solution. In the filtration and washing process, the neutralized cellulose solution is filtered and washed by a filtration device to remove impurities and residual acetic acid. In the regenerated cellulose process, the filtered and washed cellulose solution is dried to evaporate the water in the solution to obtain pure regenerated cellulose.

3. The acetic acid sheet processing process according to claim 1, characterized in that: A primary pulley (9) is fixedly installed on the output shaft of the driving motor (8). A secondary pulley (10) is fixedly installed at the lower end of the rotating shaft (2). The primary pulley (9) and the secondary pulley (10) are connected by a transmission belt (11) for transmission connection.

4. The acetic acid sheet processing process according to claim 3, characterized in that: A mechanical seal (19) is installed at the port position of the main liquid chamber (16). The acid supply pipe (4) is connected to the inner ring of the mechanical seal (19), and the acid supply pipe (4) is positioned on the bottom surface of the kettle body (1) through a pipe support (20).

5. The acetic acid sheet processing process according to claim 4, characterized in that: A piston chamber (21) is provided at the port position of the liquid outlet hole (18). A threaded hole (22) is provided at the port position of the piston chamber (21). An anti-backflow member (23) is arranged in the piston chamber (21). A fastener (24) is installed in the threaded hole (22). The anti-backflow member (23) is limited by the fastener (24). The outer end surface of the fastener (24) is provided with an internal hexagonal wrench groove, and a push rod hole is provided at the bottom surface of the internal hexagonal wrench groove.

6. The acetic acid sheet processing process according to claim 5, characterized in that: The anti-backflow member (23) is composed of a piston (25), a push rod (26) and a return spring (27). The piston (25) and the push rod (26) are integrally formed. A main flow channel (28) is provided on the piston (25) and the push rod (26). A secondary flow channel (29) is provided on the side wall of the main flow channel (28). The main flow channel (28) does not penetrate through the push rod (26). The piston (25) is movably arranged in the piston chamber (21), and the push rod (26) is movably arranged in the push rod hole. The return spring (27) is sleeved on the push rod (26), and the two ends of the return spring (27) are respectively abutted against the piston (25) and the fastener (24).

7. The acetic acid sheet processing method according to claim 6, characterized in that: A sealing washer (31) is provided at the bottom of the groove of the threaded hole (22). A sealing groove is provided on the side wall of the secondary flow channel (29), and a rubber sealing ring (30) is embedded in the sealing groove. When the anti-backflow member (23) and the fastener (24) are actually installed, the sealing washer (31) and the rubber sealing ring (30) are both in a compressed state.

8. The acetic acid sheet processing technology according to claim 7, characterized in that: A retaining ring (32) is integrally formed on the side wall of the piston chamber (21). When the return spring (27) is in a reset state, the piston (25) abuts against the retaining ring (32), and at this time, the secondary flow channel (29) is located inside the rubber sealing ring (30).

9. The acetic acid sheet processing process according to claim 1, characterized in that: All the upper structures of the reactor are made of acid-resistant materials.

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