PVC weather-resistant and corrosion-resistant chlorinated polyethylene thermoplastic elastomer additive production device

Abstract

The utility model provides a PVC weather -resistant corrosion -resistant chlorinated polyethylene thermoplastic elastomer auxiliary production device, including reactor, deacidification washer, rubbing crusher, chlorinated polyethylene accumulator and extruder, and the reactor bottom communicates with deacidification washer through total liquid pipe, and the deacidification washer is provided with the filter screen of slanting in, and the lowest end of filter screen communicates with the inlet of first spiral discharge conveyer through pipeline with the corresponding position of deacidification washer, and the outlet of first spiral discharge conveyer communicates with the import of rubbing crusher, and the outlet of rubbing crusher communicates with the top of chlorinated polyethylene accumulator, and the bottom of chlorinated polyethylene accumulator communicates with the inlet of second spiral discharge conveyer, and the outlet of second spiral discharge conveyer is located above the hopper of extruder, in the utility model, through setting reaction interval structure, thereby can increase polypropylene and chlorine's contact amount, contact time and contact area, thereby effectively improved chlorination efficiency, and also can add chlorine accurately, effectively reduced the dosage of chlorine.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of chlorinated polyethylene thermoplastic elastomer preparation, in particular to a PVC weather-resistant and corrosion-resistant chlorinated polyethylene thermoplastic elastomer additive production device. BACKGROUND

[0002] Chlorinated polyethylene thermoplastic elastomer is prepared by adding other plasticizers, crosslinking agents and other additives to chlorinated polyethylene as the main raw material. Chlorinated polyethylene thermoplastic elastomer can be added as a weather-resistant and corrosion-resistant additive in the production of PVC materials to increase the weather-resistant and corrosion-resistant properties of PVC materials. Since chlorinated polyethylene thermoplastic elastomer uses chlorinated polyethylene as the main raw material, the production of chlorinated polyethylene is an important link in the preparation of chlorinated polyethylene thermoplastic elastomer. Currently, there are three common methods for preparing chlorinated polyethylene: solvent method, suspension method and solid phase method. The most commonly used method is the water phase suspension method and the hydrochloric acid phase suspension method in the suspension method. Since the hydrochloric acid phase suspension method is an improved process of the water phase suspension method, it is currently recognized as the optimal method for producing chlorinated polyethylene. However, the hydrochloric acid phase suspension method requires the introduction of chlorine gas for reaction during the preparation process. Since the density of polyethylene is less than that of hydrochloric acid, it only suspends on the surface of hydrochloric acid. After chlorine gas is introduced into hydrochloric acid, it will float to the upper space of the reaction kettle and react there. Therefore, the contact between chlorine gas and polyethylene is less, resulting in low chlorination reaction efficiency. SUMMARY

[0003] The application provides a PVC weather-resistant and corrosion-resistant chlorinated polyethylene thermoplastic elastomer additive production device to solve the defects in the prior art.

[0004] The application is implemented by the following technical solutions:

[0005] The utility model provides a PVC weather -resistant corrosion -resistant chlorinated polyethylene thermoplastic elastomer auxiliary production device, including reactor, deacidification washer, rubbing crusher, chlorinated polyethylene accumulator and extruder, the top of reactor is connected with hydrochloric acid inlet pipe, a plurality of reaction interval structures are arranged in the reactor, the reaction interval structure includes two crosspieces, the crosspiece is fixedly connected with the reactor, the bottom of crosspiece is wavy, the crosspiece is provided with a through slot in the corresponding position of one side in the reactor, another crosspiece is provided with a through slot in the corresponding position of another side in the reactor, the top of reactor is passed through by chlorine pipe, the bottom of chlorine pipe is located in the bottom of reactor, the chlorine pipe passes through all reaction interval structures and is fixedly connected with it, the bottom end of chlorine pipe is located in the side of the through slot away from the lowest crosspiece in the reactor, the position of each crosspiece away from the through slot is connected with the feed pipe, the horizontal position of feed pipe is below the corresponding crosspiece, the feed pipe is obliquely arranged, the highest end of the feed pipe is connected with the reactor, the first check valve is arranged on the feed pipe, the branch outlet pipe is connected with the total outlet pipe on the other end, the top of total outlet pipe is connected with the bottom of reactor, the first electromagnetic valve is arranged on the hydrochloric acid inlet pipe, chlorine pipe, branch outlet pipe and total outlet pipe, the bottom of total outlet pipe is connected with the top of deacidification washer, the filter screen is arranged in the deacidification washer, the lowest end of filter screen is connected with the first spiral discharge conveyor through the pipeline in the corresponding position of deacidification washer, the top of deacidification washer is connected with the washing water inlet pipe, the bottom of deacidification washer is connected with the liquid discharge pipe, the second electromagnetic valve is arranged on the connection pipeline of deacidification washer and first spiral discharge conveyor, the washing water inlet pipe and liquid discharge pipe, the outlet of first spiral discharge conveyor is connected with the inlet of rubbing crusher, the rubbing crusher is provided with drying function, the outlet of rubbing crusher is connected with the top of chlorinated polyethylene accumulator, the bottom of chlorinated polyethylene accumulator is connected with the inlet of second spiral discharge conveyor, the outlet of second spiral discharge conveyor is located above the hopper of extruder.

[0006] The utility model provides a PVC weather -resistant corrosion -resistant chlorinated polyethylene thermoplastic elastomer auxiliary production device, the bottom of crosspiece is provided with ceramic carrier catalytic layer.

[0007] The utility model provides a PVC weather -resistant corrosion -resistant chlorinated polyethylene thermoplastic elastomer auxiliary production device, the bottom end of chlorine pipe is provided with barrier net.

[0008] As described above, in a PVC weather-resistant and corrosion-resistant chlorinated polyethylene thermoplastic elastomer additive production apparatus, both the reactor and the deacidification and washing unit are equipped with ultrasonic stirrers. An ultrasonic stirrer is installed between two adjacent horizontal plates in the reactor, and an ultrasonic stirrer is installed above the top horizontal plate and below the bottom horizontal plate in the reactor. The ultrasonic stirrer in the deacidification and washing unit is located at a position corresponding to the middle of the filter screen.

[0009] As described above, in a production apparatus for PVC weather-resistant and corrosion-resistant chlorinated polyethylene thermoplastic elastomer additives, an aerator is installed at the bottom of the deacidification and washing unit, and the top of the deacidification and washing unit is connected to a chlorine recovery tank via a pipeline. A negative pressure pump and a second one-way valve are installed on the pipeline of the pre-chlorine recovery tank component of the deacidification and washing unit. The top of the deacidification and washing unit is connected to an air inlet pipe, and a third solenoid valve is installed on the air inlet pipe.

[0010] As described above, in a PVC weather-resistant and corrosion-resistant chlorinated polyethylene thermoplastic elastomer additive production device, the bottom of the chlorinated polyethylene storage device is connected to a sampling tube, and a fourth solenoid valve is installed on the sampling tube.

[0011] The above-described apparatus for producing PVC weather-resistant and corrosion-resistant chlorinated polyethylene thermoplastic elastomer additives.

[0012] The advantages of this invention are: by setting a reaction interval structure, the contact amount, contact time and contact area between polypropylene and chlorine can be increased, thereby effectively improving the chlorination efficiency. At the same time, chlorine can be added precisely, effectively reducing the amount of chlorine used. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of the present invention;

[0015] Figure 2 This is a schematic diagram of the internal structure of the reactor of the present invention;

[0016] Figure 3 yes Figure 2 A magnified view of part I.

[0017] Reference numerals: 1. Reactor; 2. Deacidifying scrubber; 3. Crusher; 4. Chlorinated polyethylene storage tank; 5. Extruder; 6. Hydrochloric acid inlet pipe; 7. Horizontal plate; 8. Through-channel; 9. Chlorine pipe; 10. Feed pipe; 11. First check valve; 12. Branch outlet pipe; 13. Main outlet pipe; 14. First solenoid valve; 15. First screw conveyor; 16. Washing water inlet pipe; 17. Drain pipe; 18. Second solenoid valve; 19. Second screw conveyor; 20. Ceramic carrier catalyst layer; 21. Barrier mesh; 22. Ultrasonic stirrer; 23. Aerator; 24. Chlorine recovery tank; 25. Negative pressure pump; 26. Second check valve; 27. Air inlet pipe; 28. Third solenoid valve; 29. ​​Sampling pipe; 30. Fourth solenoid valve; 31. Filter screen. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] A production apparatus for PVC weather-resistant and corrosion-resistant chlorinated polyethylene thermoplastic elastomer additives includes a reactor 1, a deacidifying and washing unit 2, a crusher 3, a chlorinated polyethylene storage unit 4, and an extruder 5. The top of the reactor 1 is connected to a hydrochloric acid inlet pipe 6. An array of reaction interval structures is provided inside the reactor 1. Each reaction interval structure includes two horizontal plates 7, which are fixedly connected to the reactor 1. The bottom of each horizontal plate 7 is wavy. One horizontal plate 7 has a through-groove 8 at a corresponding position on one side of the reactor 1, and the other horizontal plate 7 has a through-groove 8 at a corresponding position on the other side of the reactor 1. The top of the reactor 1 is protected by chlorine gas. The chlorine pipe 9 passes through all reaction compartment structures and is fixedly connected to them. The bottom of the chlorine pipe 9 is located at the bottom of the reactor 1, away from the lowest horizontal plate 7. The reactor 1 and each horizontal plate 7 are connected to the feed pipe 10 at a position away from the feed pipe 8. The feed pipe 10 is horizontally located below the corresponding horizontal plate 7 and is obliquely arranged. The connection end of the feed pipe 10 to the reactor 1 is the highest point. A first one-way valve 11 is installed on the feed pipe 10. Above the feed pipe 10 on the reactor 1, there is a branch outlet pipe 12. The branch outlet pipe 12 is connected to the main outlet pipe 13. The top of the main outlet pipe 13 is connected to the bottom of the reactor 1. A first solenoid valve 14 is installed on the hydrochloric acid inlet pipe 6, chlorine pipe 9, branch outlet pipe 12, and main outlet pipe 13. The bottom of the main outlet pipe 13 is connected to the top of the deacidification scrubber 2. An inclined filter screen 31 is installed inside the deacidification scrubber 2. The lowest point of the filter screen 31 is connected to the inlet of the first screw conveyor 15 through a pipe at the corresponding position of the deacidification scrubber 2. The top of the deacidification scrubber 2 is connected to the main outlet pipe 13. The washing water inlet pipe 16 is connected to the bottom of the deacidifying washer 2, which is connected to the drain pipe 17. A second solenoid valve 18 is installed on the connecting pipe of the deacidifying washer 2 and the first screw conveyor 15, the washing water inlet pipe 16, and the drain pipe 17. The outlet of the first screw conveyor 15 is connected to the inlet of the pulverizer 3. The pulverizer 3 has a drying function. The outlet of the pulverizer 3 is connected to the top of the chlorinated polyethylene storage 4. The bottom of the chlorinated polyethylene storage 4 is connected to the inlet of the second screw conveyor 19. The outlet of the second screw conveyor 19 is located above the hopper of the extruder 5. In use, hydrochloric acid is added to reactor 1 through hydrochloric acid inlet pipe 6. Since permeable grooves 8 are provided on each of the horizontal plates 7, the hydrochloric acid can flow along these grooves to the bottom of reactor 1. Addition is stopped when the hydrochloric acid level is 50 to 80 centimeters above the top horizontal plate 7. Then, polypropylene powder and related additives are uniformly added to reactor 1 through feed pipe 10. Feed pipe 10 uses a solid pump to pump the polypropylene powder and related additives into reactor 1. The first one-way valve 11 effectively prevents the hydrochloric acid solution from flowing out through feed pipe 10.Meanwhile, the obliquely arranged feed pipe 10 can prevent some polypropylene powder and related additives from remaining in the feed pipe 10 due to being in a suspended state, ensuring the normal progress of the reaction. After feeding, because the bottom of the horizontal plate 7 is wavy, the polypropylene powder and related additives are suspended and fixed in the wavy depression at the bottom of the horizontal plate. Then, the reactor 1 is heated by the heating device, and then the first solenoid valve 14 on the chlorine pipe 9 is opened to introduce chlorine gas. Since the bottom end of the chlorine pipe 9 is located on the side of the reactor 1 away from the through groove 8 of the lowest horizontal plate 7, and in each reaction interval structure, one of the horizontal plates 7 has a through groove 8 corresponding to one side of the reactor 1, and the other horizontal plate 7 has a through groove 8 corresponding to the other side of the reactor 1, the chlorine gas will flow along the bottom of the horizontal plate 7. The wavy, serpentine flow of the chlorine gas through the through-channel 8 moves upwards. The polypropylene powder and related additives are suspended in the wavy depressions at the bottom of the horizontal plate, allowing for thorough contact and reaction with the polypropylene powder and additives during chlorine movement. This effectively improves chlorination efficiency. Furthermore, since chlorine can pollute the environment, this invention effectively controls the amount of chlorine used, reducing the amount used during chlorination and minimizing residual chlorine after chlorination, thus effectively protecting the environment. After chlorine addition, the first solenoid valve 14 on the chlorine pipe 9 is closed to continue the reaction. After the chlorination reaction is complete, the first solenoid valve 14 on the branch outlet pipe 12 is opened sequentially from top to bottom, facilitating the flow of chlorinated polyethylene through the corresponding outlet pipes in the space divided by the horizontal plate 7. 12. Finally, open the first solenoid valve 14 on the main outlet pipe 13 to discharge the chlorinated polyethylene and hydrochloric acid solid-liquid mixture at the bottom of reactor 1, which then enters the deacidification scrubber 2. In the deacidification scrubber 2, first open the second solenoid valve 18 on the drain pipe 17 to discharge the hydrochloric acid solution. The chlorinated polyethylene is blocked by the filter screen 31 and separated from the hydrochloric acid solution. The hydrochloric acid solution can be sent to the corresponding recovery tank for recycling, thereby realizing resource recycling. After all the hydrochloric acid solution is discharged, close the second solenoid valve 18 on the drain pipe 17, and then open the second solenoid valve 18 on the washing water inlet pipe 16 to allow washing water to enter and wash the chlorinated polyethylene on the filter screen 31. After washing is completed, open the second solenoid valve 18 on the drain pipe 17, and the washing water can also be sent to the corresponding recovery tank for recycling. The number of washes is determined based on the pH test results of the wash water. After the wash water meets the standard, it is completely discharged. The second solenoid valve 18 on the drain pipe 17 is closed, and the second solenoid valve 18 on the connecting pipe between the deacidifying washer 2 and the first screw conveyor 15 is opened. Due to the oblique setting of the filter screen, the chlorinated polyethylene accumulates at the connecting pipe between the deacidifying washer 2 and the first screw conveyor 15. The first screw conveyor 15 is then turned on, and it simultaneously carries a certain negative pressure, thereby conveying the wet chlorinated polyethylene material on the filter screen 31 from the deacidifying washer 2 into the pulverizer 3 with drying function, realizing integrated pulverization and drying operation. The pulverized and dried chlorinated polyethylene is then sent to the chlorinated polyethylene storage 4 for sampling and testing.After the sample passes inspection, the second screw conveyor 19 is activated to feed chlorinated polyethylene into the hopper of extruder 5. The hopper of extruder 5 has a built-in weighing function, allowing for convenient weighing of the added chlorinated polyethylene. Then, other additives are added according to the mass of the chlorinated polyethylene and the mixture is melt-extruded and granulated to obtain chlorinated polyethylene thermoplastic elastomer.

[0020] Specifically, in this embodiment, a ceramic carrier catalyst layer 20 is provided at the bottom of the horizontal plate 7. Since most of the polyethylene and chlorine react at the bottom of the horizontal plate 7, the ceramic carrier catalyst layer 20 at the bottom of the horizontal plate 7 can effectively play a catalytic role, thereby improving the chlorination reaction efficiency.

[0021] Specifically, in this embodiment, a barrier mesh 21 is provided at the bottom of the chlorine gas pipe 9. The barrier mesh 21 can effectively prevent polypropylene and related additives from entering the chlorine gas pipe 9 during the reaction, ensuring that the reaction proceeds normally.

[0022] Furthermore, because reactor 1 has multiple horizontal plates 7 and deacidification washer 2 has a filter screen 31, conventional stirring devices cannot be used normally, thus affecting reaction and washing efficiency. To overcome the above problems, both reactor 1 and deacidification washer 2 in this embodiment are equipped with ultrasonic stirrers 22. One ultrasonic stirrer 22 is placed between two adjacent horizontal plates 7 in reactor 1, and one ultrasonic stirrer 22 is placed above the top horizontal plate 7 and below the bottom horizontal plate 7 in reactor 1. The ultrasonic stirrer 22 in deacidification washer 2 is positioned corresponding to the middle of the filter screen 31. The ultrasonic stirrer 22 facilitates stirring operations and effectively improves reaction and washing efficiency.

[0023] Furthermore, since some chlorine gas remains after the reaction, and because the density of chlorine gas is much greater than that of air, the remaining chlorine gas will enter the deacidification scrubber 2. At the same time, some chlorine gas is also dissolved in the hydrochloric acid solution. If it is not recovered, the chlorine gas may be released into the air during subsequent operations, causing environmental pollution. In order to overcome the above problems, an aerator 23 is installed at the bottom of the deacidification scrubber 2 in this embodiment. The top of the deacidification scrubber 2 is connected to the chlorine recovery tank 24 through a pipeline. A negative pressure pump 25 and a second one-way valve 26 are installed on the pipeline of the pre-chlorine recovery tank 24 of the deacidification scrubber 2. The top of the deacidification scrubber 2 is connected to the air inlet pipe 27, and a third solenoid valve 28 is installed on the air inlet pipe 27. The aerator 23 effectively releases chlorine from the hydrochloric acid solution. At the same time, the second solenoid valve 18 and the third solenoid valve 28 are closed, and the negative pressure pump 25 is turned on to transfer the chlorine in the deacidification scrubber 2 to the chlorine recovery tank 24. The chlorine recovery tank 24 absorbs and recycles the chlorine through the chlorine recovery liquid, which can effectively recycle resources while protecting the environment. Meanwhile, the second one-way valve 26 ensures that chlorine will not be back-drawn into the deacidification scrubber 2 after the negative pressure pump 25 is turned off after the chlorine recovery is completed, ensuring the chlorine removal and recovery efficiency. After the chlorine is removed, the third solenoid valve 28 is opened to introduce air through the air inlet pipe 27 to make the internal and external pressures equal, so that subsequent operations can proceed normally.

[0024] Furthermore, since sampling within the chlorinated polyethylene storage device 4 is inconvenient, to overcome the aforementioned problem, the bottom of the chlorinated polyethylene storage device 4 in this embodiment is connected to the sampling tube 29, and a fourth solenoid valve 30 is installed on the sampling tube 29. Sampling can be conveniently completed through the sampling tube 29 and the fourth solenoid valve 30, making it easy to use.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A production apparatus for PVC weather-resistant and corrosion-resistant chlorinated polyethylene thermoplastic elastomer additives, characterized in that: The reactor (1) includes a deacidification scrubber (2), a crusher (3), a chlorinated polyethylene storage tank (4), and an extruder (5). The top of the reactor (1) is connected to a hydrochloric acid inlet pipe (6). An array of reaction interval structures is set inside the reactor (1). The reaction interval structure includes two horizontal plates (7). The bottom of the horizontal plates (7) is wavy. One horizontal plate (7) has a through groove (8) at a position corresponding to one side of the reactor (1), and the other horizontal plate (7) has a through groove (8) at a position corresponding to the other side of the reactor (1). The top of the reactor (1) is pierced by a chlorine gas pipe (9). The chlorine pipe (9) is fixedly connected to all reaction interval structures. The bottom end of the chlorine pipe (9) is located on the side of the through groove (8) in the reactor (1) away from the lowest horizontal plate (7). The reactor (1) and each horizontal plate (7) are connected to the feed pipe (10) at the position away from the through groove (8). The feed pipe (10) is horizontally located below the corresponding horizontal plate (7). The connection end of the feed pipe (10) to the reactor (1) is the highest point. A first one-way valve (11) is installed on the feed pipe (10). The feed pipe (10) on the reactor (1) is connected to the branch outlet pipe (12) above the feed pipe (10). The branch outlet pipe (12) is also connected to the branch outlet pipe (12). One end is connected to the main outlet pipe (13), the top end of the main outlet pipe (13) is connected to the bottom of the reactor (1), a first solenoid valve (14) is installed on the hydrochloric acid inlet pipe (6), chlorine pipe (9), branch outlet pipe (12) and the main outlet pipe (13), the bottom end of the main outlet pipe (13) is connected to the top of the deacidification scrubber (2), an inclined filter screen (31) is installed in the deacidification scrubber (2), the lowest end of the filter screen (31) is connected to the inlet of the first screw conveyor (15) through a pipeline to the corresponding position of the deacidification scrubber (2), and the top of the deacidification scrubber (2) is connected to the washing water inlet pipe (16). The bottom of the deacidification washing machine (2) is connected to the drain pipe (17). The deacidification washing machine (2) is connected to the first spiral discharge conveyor (15), the washing water inlet pipe (16), and the drain pipe (17) are equipped with a second solenoid valve (18). The outlet of the first spiral discharge conveyor (15) is connected to the inlet of the crusher (3). The outlet of the crusher (3) is connected to the top of the chlorinated polyethylene storage (4). The bottom of the chlorinated polyethylene storage (4) is connected to the inlet of the second spiral discharge conveyor (19). The outlet of the second spiral discharge conveyor (19) is located above the hopper of the extruder (5).

2. The apparatus for producing PVC weather-resistant and corrosion-resistant chlorinated polyethylene thermoplastic elastomer additives according to claim 1, characterized in that: A ceramic carrier catalyst layer (20) is provided at the bottom of the horizontal plate (7).

3. The apparatus for producing PVC weather-resistant and corrosion-resistant chlorinated polyethylene thermoplastic elastomer additives according to claim 1, characterized in that: A barrier net (21) is provided at the bottom end of the chlorine pipe (9).

4. The apparatus for producing PVC weather-resistant and corrosion-resistant chlorinated polyethylene thermoplastic elastomer additives according to claim 1, characterized in that: Both the reactor (1) and the deacidification washing machine (2) are equipped with ultrasonic stirrers (22). An ultrasonic stirrer (22) is set between two adjacent horizontal plates (7) in the reactor (1). An ultrasonic stirrer (22) is set above the top horizontal plate (7) and below the bottom horizontal plate (7) in the reactor (1). The ultrasonic stirrer (22) in the deacidification washing machine (2) is set at the corresponding position in the middle of the filter screen (31).

5. The apparatus for producing PVC weather-resistant and corrosion-resistant chlorinated polyethylene thermoplastic elastomer additives according to claim 1, characterized in that: An aerator (23) is installed at the bottom of the deacidification scrubber (2). The top of the deacidification scrubber (2) is connected to a chlorine recovery tank (24) via a pipeline. A negative pressure pump (25) and a second one-way valve (26) are installed on the pipeline connecting the deacidification scrubber (2) and the chlorine recovery tank (24). The top of the deacidification scrubber (2) is connected to an air inlet pipe (27). A third solenoid valve (28) is installed on the air inlet pipe (27).

6. The apparatus for producing PVC weather-resistant and corrosion-resistant chlorinated polyethylene thermoplastic elastomer additives according to claim 1, characterized in that: The bottom of the chlorinated polyethylene storage device (4) is connected to the sampling tube (29), and a fourth solenoid valve (30) is provided on the sampling tube (29).

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