Continuous production apparatus for melamine type polyol

Abstract

The utility model discloses melamine type series polyol continuous production device belongs to polyol production technical field, and it is including: support seat, through the cooperation of above -mentioned each device, in the utility model, according to the index requirement of product, sets up the discharge gate of film evaporator in sampling port real -time monitoring point, under the cooperation of emptying system and vacuum system, realizes the device to solvent and product through negative pressure and receives material, has improved the convenience of production device's material receiving, and the design of reverberatory processing pipeline can be according to the index of product and is recycled and handled to realize the secondary reaction to product, further guarantee the product quality of production device, and solvent can be used as raw material and is recycled and used, reduced the waste of material in polyol production, further embodied the environmental protection of production device, and the solvent recovered can also be used for washing pipeline, guarantee the flow of pipeline, the flow of product in the pipeline is convenient, has improved the production efficiency of production device.

Description

Technical Field

[0001] This utility model belongs to the field of polyol production technology, and in particular relates to a continuous production device for melamine-type polyols. Background Technology

[0002] Melamine-type polyols are a class of organic compounds containing two or more hydroxyl groups in their molecules. Their physical properties change with increasing molecular weight. They are usually viscous liquids or crystalline solids, and are characterized by high boiling points, strong solubility, low toxicity and volatility. Based on the number of hydroxyl groups and molecular structure, they can be classified into polyether polyols, polyester polyols, etc.

[0003] In the production of melamine-type polyols, the intermittent process is mainly used. However, when using the intermittent process, the overall quality of the product obtained is unstable, the production cycle of polyols is long, which reduces the production efficiency of polyols. At the same time, the overall operation process is relatively cumbersome, and the production equipment has a weak ability to recover solvents, which easily leads to solvent waste and increases the production cost of polyols.

[0004] Therefore, this invention provides a continuous production apparatus for melamine-type polyols to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] This invention provides a continuous production apparatus for melamine-type polyols, aiming to solve the problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A continuous production device for melamine-type polyols includes: a support base, a reaction vessel fixedly mounted on the upper surface of the support base by a bracket, a discharge pipeline connected to the lower surface of the reaction vessel, a first pump connected to one end of the discharge pipeline, and the lower surface of the first pump being fixedly connected to the upper surface of the support base.

[0010] A thin-film evaporator, wherein the outer surface of the thin-film evaporator is fixedly connected to the upper surface of the support base via a bracket, and a feeding pipeline is installed at the input end of the thin-film evaporator, one end of which is fixedly connected to the output end of the first pump.

[0011] As a further description of the above technical solution:

[0012] A discharge pipeline is connected to the lower surface of the thin-film evaporator, and a second pump is connected to one end of the discharge pipeline. The lower surface of the second pump is fixedly connected to the upper surface of the support base.

[0013] As a further description of the above technical solution:

[0014] The output end of the second pump is connected to a recycle processing pipeline. One end of the recycle processing pipeline is connected to the upper surface of the reactor. Adjusting valves are fixedly installed in the middle sections of the recycle processing pipeline, the discharge pipeline, and the discharge pipeline.

[0015] As a further description of the above technical solution:

[0016] A feed line is connected to the outer surface of the thin film evaporator. The connection between the feed line and the thin film evaporator is located in the upper part of the thin film evaporator. A condenser is connected to one end of the feed line. The lower surface of the condenser is fixedly connected to the upper surface of the support base.

[0017] As a further description of the above technical solution:

[0018] The output end of the condenser is connected to a solvent recovery pipeline, and a number of solvent recovery tanks are connected to the solvent recovery pipeline. The lower surface of the solvent recovery tanks is fixedly connected to the upper surface of the support base.

[0019] As a further description of the above technical solution:

[0020] The solvent recovery tanks are connected by a first vacuum line and a first vent line, and exhaust lines are connected to the outer surfaces of both the first vacuum line and the first vent line.

[0021] As a further description of the above technical solution:

[0022] The outer surface of the recycle processing pipeline is connected to a receiving pipeline, and one end of the receiving pipeline is connected to a plurality of receiving storage tanks. The lower surface of the receiving storage tanks is fixedly connected to the upper surface of the support base.

[0023] As a further description of the above technical solution:

[0024] A second vacuum line and a second vent line are connected between the receiving tanks. The outer surfaces of the second vacuum line and the second vent line are both connected to a venting line. A packaging line is also connected between the receiving tanks. The outer surface of the packaging line is connected to a discharge line.

[0025] (III) Beneficial Effects

[0026] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0027] In this invention, based on the product's specifications, the sampling port is set at the outlet of the thin-film evaporator for real-time monitoring. With the cooperation of the venting system and the vacuum system, the device achieves negative pressure collection of solvent and product, improving the convenience of material collection in the production device. At the same time, the design of the recycling pipeline allows for recycling based on the product's specifications, thereby enabling secondary reactions of the product and further ensuring the product quality of the production device. Furthermore, the solvent can be recycled as a raw material, reducing material waste in polyol production and further demonstrating the environmental friendliness of the production device. The recovered solvent can also be used to clean the pipeline, ensuring pipeline flow and facilitating product flow within the pipeline, thus improving the production efficiency of the production device. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of a continuous production unit for melamine-type polyols.

[0029] Figure 2 This is a three-dimensional structural diagram of a continuous production unit for melamine-type polyols from another angle.

[0030] Figure 3 This is a schematic diagram of the working process structure of a continuous production unit for melamine-type polyols.

[0031] Legend:

[0032] 1. Reactor; 2. Feeding line; 3. Thin-film evaporator; 4. Recycled processing line; 5. Condenser; 6. Receiving line; 7. Solvent recovery line; 8. First vacuum line; 9. First vent line; 10. Solvent recovery tank; 11. Second vacuum line; 12. Second vent line; 13. Receiving storage tank; 14. Packaging line; 15. Support base; 16. Discharge line; 17. First pump; 18. Conveying line; 19. Discharge line; 20. Second pump. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0034] In specific implementation, such as Figures 1-3As shown, this utility model provides a technical solution: a continuous production device for melamine-type polyols, including a support base 15, a reaction vessel 1 fixedly mounted on the upper surface of the support base 15 by a bracket, a discharge pipeline 16 connected to the lower surface of the reaction vessel 1, a first pump 17 connected to one end of the discharge pipeline 16, and the lower surface of the first pump 17 fixedly connected to the upper surface of the support base 15; a thin film evaporator 3, the outer surface of the thin film evaporator 3 fixedly connected to the upper surface of the support base 15 by a bracket, a feeding pipeline 2 connected to the input end of the thin film evaporator 3, and one end of the feeding pipeline 2 fixedly connected to the output end of the first pump 17.

[0035] A discharge pipeline 19 is connected to the lower surface of the thin film evaporator 3. A second pump 20 is connected to one end of the discharge pipeline 19. The lower surface of the second pump 20 is fixedly connected to the upper surface of the support base 15.

[0036] The output end of the second pump 20 is connected to the furnace return treatment pipeline 4. One end of the furnace return treatment pipeline 4 is connected to the upper surface of the reactor 1. The middle sections of the furnace return treatment pipeline 4, the discharge pipeline 16 and the discharge pipeline 19 are all fixedly equipped with regulating valves.

[0037] A feed line 18 is connected to the outer surface of the thin film evaporator 3. The connection between the feed line 18 and the thin film evaporator 3 is located in the upper part of the thin film evaporator 3. A condenser 5 is connected to one end of the feed line 18. The lower surface of the condenser 5 is fixedly connected to the upper surface of the support base 15.

[0038] The output end of the condenser 5 is connected to a solvent recovery pipeline 7, and several solvent recovery tanks 10 are connected to the solvent recovery pipeline 7. The lower surface of the solvent recovery tank 10 is fixedly connected to the upper surface of the support base 15.

[0039] A first vacuum line 8 and a first vent line 9 are connected and installed between the solvent recovery tanks 10. Exhaust lines are installed on the outer surfaces of both the first vacuum line 8 and the first vent line 9.

[0040] Specifically, through the cooperation of the above-mentioned structures, the raw materials are injected into the reactor 1 through the feed line of the reactor 1. Then, the raw materials are stirred and reacted in the reactor 1. After the reaction is completed, the first pump 17 draws the product in the reactor 1 into the thin film evaporator 3 through the discharge line 16 and the feed line 2. Under the action of the thin film evaporator 3, the solvent in the product will be evaporated. The solvent vapor enters the condenser 5 through the feed line 18. Under the action of the condenser 5, the solvent vapor is condensed into liquid and then recovered into the solvent recovery tank 10 through the solvent recovery line 7, thereby recovering the solvent. The first vacuum line 8 and the first vent line 9 are connected to the venting system through the exhaust line and the vacuum system, thereby performing vacuuming and venting treatment on the inside of the solvent recovery tank 10, realizing the recovery of the solution.

[0041] It should be noted that the selection of condenser 5 and control unit in the above description are selected as needed. This part is well-known technology in the field and will not be described in detail here.

[0042] It should be noted that the selection of the thin-film evaporator 3 and the control unit in the above description are selected as needed. This part is well-known technology in the field and will not be described in detail here.

[0043] The outer surface of the reprocessing pipeline 4 is connected to a receiving pipeline 6, and one end of the receiving pipeline 6 is connected to a number of receiving storage tanks 13. The lower surface of the receiving storage tanks 13 is fixedly connected to the upper surface of the support base 15.

[0044] A second vacuum line 11 and a second vent line 12 are connected between the receiving tanks 13. Venting lines are installed on the outer surfaces of the second vacuum line 11 and the second vent line 12. A packaging line 14 is also connected between the receiving tanks 13. A discharge line is installed on the outer surface of the packaging line 14.

[0045] Specifically, through the cooperation of the above structures, after the product is evaporated by the thin-film evaporator 3, the evaporated product will accumulate at the bottom of the thin-film evaporator 3. Under the action of the second pump 20, the evaporated product is transported in the discharge pipeline 19 and the return processing pipeline 4. After the regulating valve on the return processing pipeline 4 is closed, the product will be transported to the receiving storage tank 13 through the receiving pipeline 6. During the receiving process, the second vacuum pipeline 11 and the second venting pipeline 12 are connected to the venting system through the venting pipeline and the vacuum system to realize the vacuuming and venting of the receiving storage tank 13, thereby realizing the collection of the product. Then, the product in the receiving storage tank 13 is discharged through the packaging pipeline 14 and the discharge pipeline. When the evaporated product does not meet the requirements, the regulating valve on the return processing pipeline 4 can be opened. At this time, the product at the bottom of the thin-film evaporator 3 re-enters the interior of the reactor 1 for secondary reaction under the action of the discharge pipeline 19 and the return processing pipeline 4, ensuring the production quality of the product.

[0046] It should be noted that the selection of vacuum system and venting system and control unit in the above description are all selected as needed. This part is well-known technology in the field and will not be elaborated here.

[0047] Working principle: The raw materials are injected into the reactor 1 through the feed line of the reactor 1. The raw materials are then stirred and reacted in the reactor 1. After the reaction is completed, the first pump 17 draws the product in the reactor 1 into the thin film evaporator 3 through the discharge line 16 and the feed line 2. Under the action of the thin film evaporator 3, the solvent in the product is evaporated. The solvent vapor enters the condenser 5 through the feed line 18. Under the action of the condenser 5, the solvent vapor is condensed into liquid and then recovered into the solvent recovery tank 10 through the solvent recovery line 7, thereby recovering the solvent. The first vacuum line 8 and the first vent line 9 are connected to the venting system through the exhaust line and the vacuum system, thereby performing vacuuming and venting treatment on the inside of the solvent recovery tank 10, realizing the recovery of the solution.

[0048] After the product is evaporated by the thin-film evaporator 3, the evaporated product will accumulate at the bottom of the thin-film evaporator 3. Under the action of the second pump 20, the evaporated product will be transported in the discharge pipeline 19 and the return processing pipeline 4. After the regulating valve on the return processing pipeline 4 is closed, the product will be transported to the receiving storage tank 13 through the receiving pipeline 6. During the receiving process, the second vacuum pipeline 11 and the second venting pipeline 12 are connected to the venting system through the venting pipeline and the vacuum system to realize the vacuuming and venting of the receiving storage tank 13, thereby realizing the collection of the product. Then the product in the receiving storage tank 13 is discharged through the packaging pipeline 14 and the discharge pipeline.

[0049] When the product after evaporation does not meet the requirements, the regulating valve on the return treatment pipeline 4 can be opened. At this time, the product at the bottom of the thin film evaporator 3 will re-enter the interior of the reactor 1 for a secondary reaction under the action of the discharge pipeline 19 and the return treatment pipeline 4, so as to ensure the production quality of the product.

[0050] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A continuous production apparatus for melamine-type polyols, characterized in that: include: Support base (15), the upper surface of the support base (15) is fixedly mounted with a reactor (1) by a bracket, the lower surface of the reactor (1) is connected to a discharge pipeline (16), one end of the discharge pipeline (16) is connected to a first pump (17), the lower surface of the first pump (17) is fixedly connected to the upper surface of the support base (15). The outer surface of the thin film evaporator (3) is fixedly connected to the upper surface of the support base (15) through a bracket. The input end of the thin film evaporator (3) is connected to a feeding pipeline (2), and one end of the feeding pipeline (2) is fixedly connected to the output end of the first pump (17).

2. The continuous production apparatus for melamine-type polyols according to claim 1, characterized in that, The lower surface of the thin film evaporator (3) is connected to a discharge pipeline (19), and one end of the discharge pipeline (19) is connected to a second pump (20). The lower surface of the second pump (20) is fixedly connected to the upper surface of the support base (15).

3. The continuous production apparatus for melamine-type polyols according to claim 2, characterized in that, The output end of the second pump (20) is connected to a furnace return pipeline (4). One end of the furnace return pipeline (4) is connected to the upper surface of the reactor (1). The middle sections of the furnace return pipeline (4), the discharge pipeline (16) and the discharge pipeline (19) are all fixedly equipped with regulating valves.

4. The continuous production apparatus for melamine-type polyols according to claim 1, characterized in that, The outer surface of the thin film evaporator (3) is connected to a feed line (18), and the connection between the feed line (18) and the thin film evaporator (3) is located in the upper part of the thin film evaporator (3). One end of the feed line (18) is connected to a condenser (5), and the lower surface of the condenser (5) is fixedly connected to the upper surface of the support base (15).

5. The continuous production apparatus for melamine-type polyols according to claim 4, characterized in that, The output end of the condenser (5) is connected to a solvent recovery pipeline (7), and a number of solvent recovery tanks (10) are connected to the solvent recovery pipeline (7). The lower surface of the solvent recovery tank (10) is fixedly connected to the upper surface of the support base (15).

6. The continuous production apparatus for melamine-type polyols according to claim 5, characterized in that, The solvent recovery tanks (10) are connected by a first vacuum line (8) and a first vent line (9), and exhaust lines are connected to the outer surfaces of both the first vacuum line (8) and the first vent line (9).

7. The continuous production apparatus for melamine-type polyols according to claim 3, characterized in that, The outer surface of the recycle processing pipeline (4) is connected to a receiving pipeline (6), and one end of the receiving pipeline (6) is connected to a plurality of receiving storage tanks (13). The lower surface of the receiving storage tanks (13) is fixedly connected to the upper surface of the support base (15).

8. The continuous production apparatus for melamine-type polyols according to claim 7, characterized in that, The receiving tanks (13) are connected by a second vacuum line (11) and a second vent line (12). The outer surfaces of the second vacuum line (11) and the second vent line (12) are connected by venting lines. The receiving tanks (13) are also connected by a packaging line (14). The outer surface of the packaging line (14) is connected by a discharge line.

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