Polyurethane hot melt adhesive production device capable of being circularly cleaned
By designing a recyclable and cleanable polyurethane hot melt adhesive production device, the product abnormality caused by material residue is solved by using cleaning liquid, heating, vacuum/nitrogen treatment, and efficient cleaning and safe production are achieved.
Patent Information
- Application Number
- CN202422438867.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-10
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-10-10
AI Technical Summary
The residual material in the reactor and filter in the reactor and filter occurs in a moisture-curing reaction with water at a high temperature, resulting in abnormal particles, crusts and turbidity, affecting product quality.
A circulating cleaning polyurethane hot melt adhesive production device is designed. Through components such as cleaning liquid feeding pipelines, circulation cleaning pumps, heating pipelines and vacuum/nitrogen pipelines, high-temperature cleaning and drying of the reactor and filter are realized to ensure that the cleaning liquid and residual materials are fully dissolved and discharged.
It effectively avoids the impact of material residue on product quality and production efficiency, improves cleaning effect, reduces safety hazards, and ensures product quality and production safety.
Smart Images
Figure CN223170917U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of polyurethane hot melt adhesive production, and particularly relates to a polyurethane hot melt adhesive production device capable of cyclic cleaning. Background Art
[0002] Polyurethane hot melt adhesive is a type of hot melt adhesive prepared by using polyurethane resin or prepolymer as the main material and various additives (such as catalysts, antioxidants, tackifiers, and fillers). Due to the presence of highly polar and chemically active isocyanate groups (-NCO) and urethane groups (-NHCOO-), it has excellent chemical adhesion to a variety of materials. Moreover, the hydrogen bond formed between polyurethane and the adhered material increases the intermolecular cohesion, making the adhesion more firm.
[0003] Due to the relatively high viscosity of the polyurethane hot melt adhesive itself, there will be material residues on the inner wall of the reaction kettle, the bottom valve spool, the inner wall of the filter, etc. During continuous production, the production device is in a high-temperature state for a long time. At the same time, when performing operations such as feeding, sampling, and changing the filter screen with the lid open, it is impossible to completely avoid the entry of air and moisture into the production device, resulting in a moisture curing reaction between the NCO groups in the residues in the reaction kettle, filter, etc. and water at high temperature, leading to abnormalities such as particles, skinning, and turbidity, which affect the product quality. Summary of the Utility Model
[0004] Aiming at the problem that in the prior art, the NCO groups in the material residues in the reaction kettle, filter, etc. of polyurethane hot melt adhesive react with water at high temperature to cause moisture curing reaction, resulting in abnormalities such as particles, skinning, and turbidity, which affect the product quality, the utility model proposes the following technical solutions:
[0005] A polyurethane hot melt adhesive production device capable of cyclic cleaning, including a reaction kettle with a stirrer installed inside. The device further includes:
[0006] A cleaning liquid feeding pipeline, which is connected to the reaction kettle;
[0007] A cyclic cleaning pump, which is connected to the cleaning liquid circulation inlet on the reaction kettle through a pipeline;
[0008] A filter, the output end of the reaction kettle is connected to the filter, and the output end of the filter is connected to the cyclic cleaning pump;
[0009] A heating pipeline, which is respectively connected to the outer jackets of the reaction kettle and the filter.
[0010] As a preference of the above technical solution, the heating pipeline includes a main hot medium inlet pipe, which is connected to an external heat supply source. A filter hot medium inlet pipeline and a reactor hot medium inlet pipeline are respectively connected to the main hot medium inlet pipe. The filter hot medium inlet pipeline is connected to the external jacket of the filter, and the reactor hot medium inlet pipeline is connected to the external jacket of the reactor.
[0011] As a preference of the above technical solution, a filter hot medium outlet pipeline is connected to the external jacket of the filter, and a reactor hot medium outlet pipeline is connected to the external jacket of the reactor.
[0012] As a preference of the above technical solution, a reactor tail gas pipeline is connected to the reactor.
[0013] As a preference of the above technical solution, a reactor nitrogen pipeline is connected to the reactor.
[0014] As a preference of the above technical solution, a reactor vacuum pipeline is connected to the reactor.
[0015] As a preference of the above technical solution, a reactor refrigerant inlet pipeline and a reactor refrigerant outlet pipeline are respectively connected to the external jacket of the reactor.
[0016] As a preference of the above technical solution, thermometers are installed on both the upper and lower parts of the reactor.
[0017] The beneficial effects of the present utility model are as follows:
[0018] 1. By adding a cleaning liquid into the reactor and circulating it through a circulating cleaning pump, the reactor, and the filter, the cleaning liquid can contact the residual materials in the reactor and the filter. Meanwhile, the heating pipeline is used to heat the cleaning liquid, so that the residual materials are fully dissolved with the cleaning liquid through high-temperature circulating cleaning of the cleaning liquid, and finally discharged to complete the cleaning work, effectively avoiding the influence of material residue in the production device on product quality and production efficiency during the continuous production of polyurethane hot melt adhesive;
[0019] 2. The present utility model is provided with a reactor nitrogen pipeline and a reactor vacuum pipeline. By introducing nitrogen into the reactor and evacuating the reactor, the reactor is dried. In this way, when the material residue in the reactor is cleaned, drying the reactor can further improve the cleaning effect in the reactor, thus further avoiding the influence of material residue on product quality and production efficiency. Description of the Drawings
[0020] Figure 1 It is a topological structure schematic diagram of the present utility model.
[0021] In the figure:
[0022] 1. Circulating cleaning pump; 2. Cleaning liquid circulation inlet; 3. Filter; 4. Main hot medium inlet; 5. Hot medium inlet pipeline of filter; 6. Hot medium inlet pipeline of reactor; 7. Cold medium inlet pipeline of reactor; 8. Hot medium outlet pipeline of filter; 9. Thermometer; 10. Hot medium outlet pipeline of reactor; 11. Cold medium outlet pipeline of reactor; 12. Cleaning liquid feeding pipeline; 13. Nitrogen pipeline of reactor; 14. Tail gas pipeline of reactor; 15. Vacuum pipeline of reactor; 16. Agitator; 17. Reactor. Detailed implementation manners
[0023] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments.
[0024] Embodiment
[0025] As Figure 1 shown, a polyurethane hot melt adhesive production device capable of circulating cleaning includes a reactor 17, and an agitator 16 is installed in the reactor 17. The device further includes:
[0026] A cleaning liquid feeding pipeline 12, and the cleaning liquid feeding pipeline 12 is connected to the reactor 17;
[0027] A circulating cleaning pump 1, and the circulating cleaning pump 1 is connected to the cleaning liquid circulation inlet 2 on the reactor 17 through a pipeline;
[0028] A filter 3, the output end of the reactor 17 is connected to the filter 3, and the output end of the filter 3 is connected to the circulating cleaning pump 1;
[0029] A heating pipeline, and the heating pipeline is respectively connected to the outer jackets of the reactor 17 and the filter 3.
[0030] In actual application of this embodiment, through an external transfer pump, after being metered by a flow meter, cleaning liquid is added into the reactor 17 from the cleaning liquid feeding pipeline 12. After the cleaning liquid is added, the agitator 16 is started to stir and mix the solution in the reactor 17, so that the cleaning liquid can be mixed with the residual materials in the reactor 17, and the circulating cleaning pump 1 is started, so that the cleaning liquid circulates between the reactor 17 and the filter 3, so that the cleaning liquid can contact the residual materials in the reactor 17 and the filter 3. At the same time, the heating pipeline is operated to heat both the reactor 17 and the filter 3, and the temperature of the cleaning liquid in the reactor 17 and the filter 3 is increased. The residual materials in the reactor 17 and the filter 3 are fully miscible with the cleaning liquid after high-temperature circulating cleaning with the cleaning liquid. Finally, the filter 3 and the circulating cleaning pump 1 are disconnected, and the residual materials fully miscible with the cleaning liquid are discharged from the output end of the filter 3 to complete the cleaning work.
[0031] Further, the heating pipeline includes a main heat medium inlet pipe 4, which is connected to an external heat supply source. A filter heat medium inlet pipeline 5 and a reactor heat medium inlet pipeline 6 are respectively connected to the main heat medium inlet pipe 4. The filter heat medium inlet pipeline 5 is connected to the outer jacket of the filter 3, and the reactor heat medium inlet pipeline 6 is connected to the outer jacket of the reactor 17.
[0032] In actual application of this embodiment, after the heat source enters the main heat medium inlet pipe 4, it respectively enters the outer jacket of the filter 3 and the outer jacket of the reactor 17 through the filter heat medium inlet pipeline 5 and the reactor heat medium inlet pipeline 6, so as to heat the cleaning liquid in the filter 3 and the reactor 17, thereby facilitating the mutual dissolution of the cleaning liquid and the material residue.
[0033] Further, a filter heat medium outlet pipeline 8 is connected to the outer jacket of the filter 3, and a reactor heat medium outlet pipeline 10 is connected to the outer jacket of the reactor 17.
[0034] In actual application of this embodiment, the heat source enters the outer jacket of the filter 3 and the outer jacket of the reactor 17 respectively through the filter heat medium inlet pipeline 5 and the reactor heat medium inlet pipeline 6, and finally flows out through the filter heat medium outlet pipeline 8 and the reactor heat medium outlet pipeline 10 respectively, so that heat exchange treatment can be carried out, thereby better controlling the temperature of the cleaning liquid in the reactor 17 and the filter 3.
[0035] Further, a reactor tail gas pipeline 14 is connected to the reactor 17.
[0036] In actual application of this embodiment, the waste gas generated during the cleaning process is discharged from the reactor tail gas pipeline 14, thereby effectively preventing the waste gas from accumulating in the reactor 17, increasing the internal pressure of the reactor 17, reducing the risk of rupture or explosion of the reactor 17. At the same time, since the waste gas contains harmful chemical components, avoiding the retention of these components in the reactor 17 and reacting with other substances, effectively preventing accidental chemical reactions and reducing potential safety hazards.
[0037] Further, a reactor nitrogen pipeline 13 is connected to the reactor 17.
[0038] In actual application of this embodiment, nitrogen is introduced into the reactor 17 through the reactor nitrogen pipeline 13, so as to effectively displace the moisture in the air in the reactor 17, playing a drying role, and thus improving the cleaning effect in the reactor 17 after cleaning the reactor 17.
[0039] Further, a reactor vacuum pipeline 15 is connected to the reactor 17.
[0040] In practical application of this embodiment, the reactor 17 is dried by evacuating the reactor 17 through the reactor vacuum pipeline 15. By cooperating with introducing nitrogen into the reactor 17, the drying efficiency is further improved, thereby further enhancing the cleaning effect inside the reactor 17.
[0041] Further, the outer jacket of the reactor 17 is respectively connected with a reactor refrigerant inlet pipeline 7 and a reactor refrigerant outlet pipeline 11.
[0042] Among them, the reactor refrigerant inlet pipeline 7 and the reactor refrigerant outlet pipeline 11 are connected to an external cooling source.
[0043] In practical application of this embodiment, when the material residue is miscible with the cleaning liquid, the main hot medium inlet 4 is closed, and the cooling source enters the reactor refrigerant inlet pipeline 7 and is discharged from the reactor refrigerant outlet pipeline 11 to form a cycle, thereby reducing the temperature of the mixture of the material residue and the cleaning liquid. When the cleaning liquid is discharged into the packaging barrel through the output end of the filter 3, the temperature of the mixture of the material residue and the cleaning liquid is relatively low. Since the packaging barrel needs to be manually packaged, the safety of workers during operation is improved.
[0044] Further, thermometers 9 are installed on both the upper and lower parts of the reactor 17. The thermometers 9 monitor the temperatures of the upper and lower layers inside the reactor 17 in real time, thereby facilitating the control of the heating and cooling temperatures inside the reactor 17.
[0045] Working principle: When cleaning the production device, first, through an external transfer pump, after being metered by a flow meter, the cleaning liquid is added into the reaction kettle 17 from the cleaning liquid feeding pipeline 12. After the cleaning liquid is added, start the stirrer 16 to stir and mix the solution in the reaction kettle 17, so that the cleaning liquid can be mixed with the residual materials in the reaction kettle 17, and start the circulating cleaning pump 1 to make the cleaning liquid circulate between the reaction kettle 17 and the filter 3, so that the cleaning liquid can contact the residual materials in the reaction kettle 17 and the filter 3. At the same time, let the external heat source enter the main heat medium inlet pipe 4, and enter the outer jacket of the filter 3 and the outer jacket of the reaction kettle 17 respectively through the filter heat medium inlet pipeline 5 and the reaction kettle heat medium inlet pipeline 6, and flow out through the filter heat medium outlet pipeline 8 and the reaction kettle heat medium outlet pipeline 10 for heat exchange, so as to heat the cleaning liquid in the filter 3 and the reaction kettle 17, and raise the temperature of the cleaning liquid in the reaction kettle 17 and the filter 3. The residual materials in the reaction kettle 17 and the filter 3 are fully dissolved with the cleaning liquid after being cleaned by the high-temperature circulation of the cleaning liquid. Then close the corresponding valves on the main heat medium inlet pipe 4, the filter heat medium inlet pipeline 5, the reaction kettle heat medium inlet pipeline 6, the filter heat medium outlet pipeline 8 and the reaction kettle heat medium outlet pipeline 10, so that the cold source forms a cycle by entering the reaction kettle refrigerant inlet pipeline 7 and discharging from the reaction kettle refrigerant outlet pipeline 11, so as to reduce the temperature of the material residue and the cleaning liquid mixture. Then disconnect the filter 3 and the circulating cleaning pump 1, and let the material residue and the cleaning liquid mixture be discharged through the output end of the filter 3 to complete the cleaning work. Finally, dry the production device by adding nitrogen into the reaction kettle 17 through the reaction kettle nitrogen pipeline 13 and evacuating the reaction kettle 17 through the reaction kettle vacuum pipeline 15.
[0046] The above shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.
Claims
1. A polyurethane hot melt adhesive production device that can be recycled and cleaned, including a reaction kettle (17), and a stirrer (16) is installed in the reaction kettle (17), characterized in that, The device further comprises: a cleaning liquid feeding pipeline (12), which is connected to the reaction kettle (17); a circulating cleaning pump (1), which is connected to a cleaning liquid circulating inlet (2) on the reaction kettle (17) through a pipeline; a filter (3), the output end of the reaction kettle (17) is connected to the filter (3), and the output end of the filter (3) is connected to the circulating cleaning pump (1); a heating pipeline, which is respectively connected to the outer jackets of the reaction kettle (17) and the filter (3).
2. The polyurethane hot melt adhesive production device capable of being recycled and cleaned according to claim 1, wherein, The heating pipeline includes a main heat medium inlet pipe (4), the main heat medium inlet pipe (4) is connected to an external heat supply source, a filter heat medium inlet pipeline (5) and a reaction kettle heat medium inlet pipeline (6) are respectively connected to the main heat medium inlet pipe (4), the filter heat medium inlet pipeline (5) is connected to the outer jacket of the filter (3), and the reaction kettle heat medium inlet pipeline (6) is connected to the outer jacket of the reaction kettle (17).
3. The polyurethane hot melt adhesive production device capable of being recycled and cleaned according to claim 2, characterized in that, A filter heat medium outlet pipeline (8) is connected to the outer jacket of the filter (3), and a reaction kettle heat medium outlet pipeline (10) is connected to the outer jacket of the reaction kettle (17).
4. The polyurethane hot melt adhesive production device capable of being recycled and cleaned according to claim 1, wherein A reaction kettle tail gas pipeline (14) is connected to the reaction kettle (17).
5. The polyurethane hot melt adhesive production device capable of being recycled and cleaned according to claim 1, characterized in that, A reaction kettle nitrogen gas pipeline (13) is connected to the reaction kettle (17).
6. The polyurethane hot melt adhesive production device capable of being recycled and cleaned according to claim 1, wherein A reaction kettle vacuum pipeline (15) is connected to the reaction kettle (17).
7. The polyurethane hot melt adhesive production device capable of being recycled and cleaned according to claim 1, wherein A reaction kettle refrigerant inlet pipeline (7) and a reaction kettle refrigerant outlet pipeline (11) are respectively connected to the outer jacket of the reaction kettle (17).
8. The polyurethane hot melt adhesive production device capable of being recycled and cleaned according to claim 1, wherein, Thermometers (9) are installed on both the upper and lower parts of the reaction kettle (17).