Polyphenylene sulfide resin washing device and application thereof

Abstract

The application discloses a kind of polyphenyl sulfide resin washing device and its application, it is related to chemical raw material production technical field.The application includes cleaning mechanism and feeding mechanism;Cleaning mechanism includes screw conveyor, screw conveyor is inclined to be set, the upper end of screw conveyor is equipped with discharge port and cleaning liquid inlet, the lower end of conveyor is equipped with feed inlet and cleaning liquid exhaust port;Feeding mechanism is set at the feed inlet of screw conveyor, feeding mechanism includes outer tube and inner tube, the upper end of outer tube is closed, the lower end of outer tube is communicated with feed inlet, overflow port is opened in the circumferential surface of outer tube upper end portion, inner tube uses two-end opening structure, the upper end of inner tube is fixedly connected with the upper end surface of outer tube, the lower end of inner tube is inserted into the lower end portion of outer tube.The application is inured to contact washing with cleaning liquid countercurrent in cleaning mechanism after raw material is soaked by setting cleaning mechanism and feeding mechanism, realizes continuous, efficient cleaning effect, and use amount of cleaning liquid is greatly saved, green and environmental protection.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of chemical raw material production, and particularly relates to a polyphenylene sulfide resin washing device and application thereof. BACKGROUND

[0002] Polyphenylene sulfide (PPS) is a special engineering plastic with excellent comprehensive performance. PPS has excellent high-temperature resistance, corrosion resistance, radiation resistance, flame resistance, balanced physical and mechanical properties, excellent dimensional stability and excellent electrical properties, and is widely used as a structural polymer material. After filling and modification, PPS is widely used as a special engineering plastic. Meanwhile, PPS can be made into various functional films, coatings and composite materials, and is successfully applied in the fields of electronic appliances, aerospace, automobile transportation and the like.

[0003] At present, in the production process of polyphenylene sulfide resin, product washing is mainly achieved by repeatedly reslurry washing by adding a large amount of cleaning liquid. The washing device is rough and single, and has low continuous degree. Reslurry washing not only continuously consumes clean cleaning liquid, but also produces a large amount of waste liquid with high organic matter content and high salt content, which needs to be recovered or treated. This low-efficiency washing method not only restricts economic benefits, but also has environmental protection risks. SUMMARY

[0004] The purpose of the present application is to provide a polyphenylene sulfide resin washing device. By setting a cleaning mechanism and a feeding mechanism, the polyphenylene sulfide resin is immersed by the feeding mechanism and then washed by countercurrent contact with the cleaning liquid in the cleaning mechanism. The continuous and efficient cleaning effect can be achieved, and the problems of the existing product washing device, such as roughness and single, low continuous degree, large consumption of cleaning liquid and high processing cost, can be solved. Another purpose of the present application is to provide an application of the polyphenylene sulfide resin washing device.

[0005] To solve the above technical problems, the present application is realized by the following technical scheme:

[0006] The application discloses a polyphenylene sulfide resin washing device and application thereof, which comprises a cleaning mechanism for cleaning solid-phase polyphenylene sulfide resin and a feeding mechanism for feeding the polyphenylene sulfide resin into the cleaning mechanism.

[0007] As a preferred technical scheme of the application, the screw conveyor is provided with a maintenance opening in the circumferential side, so that the inside of the conveyor can be conveniently maintained.

[0008] As a preferred technical scheme of the application, the upper end of the outer cylinder is provided with a vapor-liquid separator, which is communicated with the cavity in the outer cylinder.

[0009] As a preferred technical scheme of the application, the lower end of the inner cylinder is provided with a horn.

[0010] As a preferred technical scheme of the application, the screw conveyor is provided with a maintenance opening in the circumferential side, so that the inside of the conveyor can be conveniently maintained.

[0011] The application of the polyphenylene sulfide resin washing device is characterized in that the washing device is used as an independent washing process, and comprises the following steps: S1, closing the cleaning liquid discharge port, continuously feeding the cleaning liquid from the cleaning liquid inlet port, and allowing the cleaning liquid to flow downwards along the screw conveyor and flow into the outer cylinder; S2, feeding the solid-phase polyphenylene sulfide resin into the feeding mechanism from the upper end of the inner cylinder, allowing the solid-phase polyphenylene sulfide resin to flow into the outer cylinder from the lower end of the inner cylinder and be soaked by the cleaning liquid in the outer cylinder; S3, after the solid-phase polyphenylene sulfide resin is soaked, the solid-phase polyphenylene sulfide resin is settled into the screw conveyor from the feeding port, the screw in the screw conveyor rotates to convey the solid-phase polyphenylene sulfide resin to the discharge port at the upper end, in the screw conveyor, the cleaning liquid flows downwards and the solid-phase polyphenylene sulfide resin is conveyed upwards, the flowing directions of the two are opposite, and the solid-phase polyphenylene sulfide resin is mixed and washed; and S4, the solid-phase polyphenylene sulfide resin after washing flows out from the discharge port, and the cleaning liquid after washing flows out from the overflow port after the solid particles are intercepted by the filter screen and is recovered.

[0012] As a preferred technical scheme of the application, a plurality of the washing devices are arranged, the number of the washing devices is not less than two, and the plurality of the washing devices are sequentially connected in series, that is, the discharge port of a previous washing device is connected with the feeding port of a next washing device, so that a combined washing process is formed.

[0013] As a preferred technical scheme of the present application, the same washing liquid is introduced into several washing devices to realize multi-stage washing and improve washing effect.

[0014] As a preferred technical scheme of the present application, different washing liquids are introduced into several washing devices to realize continuous acidification, alkalization or solvent leaching and other purification treatments and improve product performance.

[0015] As a preferred technical scheme of the present application, the washing liquid includes but is not limited to one or more of water, organic solvent, acid solution and alkali solution.

[0016] The present application has the following advantages:

[0017] 1. The polyphenylene sulfide resin is soaked by the feeding mechanism and then washed by countercurrent contact with the washing liquid in the cleaning mechanism, so that continuous and efficient cleaning effect can be realized, and the amount of washing liquid can be greatly saved, which is green and environmentally friendly.

[0018] 2. The present application sets up multiple washing devices, and connects the discharge port of a washing device with the feeding port of the next washing device to form a combined washing process. When a single washing liquid is introduced into multiple washing devices, multi-stage washing can be realized to improve washing effect. When different washing liquids are introduced into multiple washing devices, continuous acidification, alkalization or solvent leaching and other purification treatments can be realized to improve product performance.

[0019] Of course, any product implementing the present application does not necessarily need to achieve all the advantages described above. DETAILED DESCRIPTION

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed for the description of the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 The structure diagram of the polyphenylene sulfide resin washing device in Embodiment 1 is shown in the figure.

[0022] Figure 2 The cross-sectional view of the polyphenylene sulfide resin washing device in Embodiment 1 is shown in the figure.

[0023] Figure 3 The cross-sectional view of the feeding mechanism in Embodiment 1 is shown in the figure. Figure 2

[0024] Figure 4 ​A structure schematic diagram of one application mode of the polyphenylene sulfide resin washing device in the embodiment two;

[0025] In the drawings, the components represented by the numbers are listed as follows:

[0026] 100 - cleaning mechanism, 200 - feeding mechanism, 1 - screw conveyor, 2 - discharge port, 3 - cleaning liquid inlet, 4 - feeding port, 5 - cleaning liquid discharge port, 6 - outer cylinder, 7 - inner cylinder, 701 - horn, 8 - overflow port, 801 - filter screen, 9 - maintenance opening, 10 - vapor-liquid separator. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] In the description of the present application, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery" and the like indicate the orientation or positional relationship, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0029] Embodiment one

[0030] Please refer to Figure 1 As shown in the drawings, the present embodiment provides a polyphenylene sulfide resin washing device, which comprises a cleaning mechanism 100 for cleaning solid-phase polyphenylene sulfide resin and a feeding mechanism 200 for injecting polyphenylene sulfide resin into the cleaning mechanism 100.

[0031] Please refer to Figures 1-2As shown, the cleaning mechanism 100 includes a screw conveyor 1, the rotating shaft inside the screw conveyor 1 is spaced three meters apart and should be increased with a boom for reinforcement and fixation, the outer edge of the helical blade should be spaced between 1-15 mm from the inner wall of the shell, and the washing polyphenylene sulfide resin is preferably 5-10 mm. The rotation speed range is 1-40 rpm, and the washing polyphenylene sulfide resin is preferably 20-25 rpm. The screw conveyor 1 is arranged obliquely, and the inclination angle of the screw conveyor 1 is 15-45° with the horizontal plane for different materials to be washed. In the polyphenylene sulfide resin washing in this embodiment, the installation inclination angle is preferably 15-20°. The screw conveyor 1 is configured with a variable frequency adjustment, and the forward and reverse rotation is adjustable. The upper end of the screw conveyor 1 is provided with a discharge port 2 and a cleaning liquid inlet 3, and the lower end of the screw conveyor 1 is provided with a feeding port 4 and a cleaning liquid discharge port 5. The side of the screw conveyor 1 is provided with a maintenance opening 9.

[0032] Please refer to Figures 2-3 As shown, the feeding mechanism 200 is arranged at the feeding port 4 of the screw conveyor 1. The feeding mechanism 200 includes an outer cylinder 6 and an inner cylinder 7. The upper end surface of the outer cylinder 6 is closed, and the lower end of the outer cylinder 6 is communicated with the feeding port 4 and fixed by a flange. The side surface of the upper end of the outer cylinder 6 is provided with an overflow port 8 for discharging cleaning liquid, and a filter screen 801 is installed in the overflow port 8. The mesh size of the filter screen is 180-220. The height of the overflow port 8 is preferably lower than the height of the discharge port 2 to avoid the cleaning liquid flowing out of the discharge port 2. The inner cylinder 7 has an open structure at both ends. The upper end of the inner cylinder 7 is fixedly connected with the upper end surface of the outer cylinder 6, and the lower end of the inner cylinder 7 extends into the lower end of the outer cylinder 6, and the lower end of the inner cylinder 7 is provided with a horn port 701. The inner cylinder 7 is located 300-600 mm above the feeding port 4, and the outer edge of the horn port 701 at the bottom end of the inner cylinder 7 is spaced 50-90 mm from the inner wall of the outer cylinder. A vapor-liquid separator 10 is installed at the upper end of the outer cylinder 6, and a tail gas connecting pipe is connected to the vapor-liquid separator 10. The vapor-liquid separator 10 is communicated with the cavity in the outer cylinder 6.

[0033] The entire washing device is made of a material that can resist corrosion of the material and the washing liquid. The device material grade is not less than 304 stainless steel, and the preferred material is 316L stainless steel.

[0034] The embodiment also provides an application of the polyphenylene sulfide resin washing device. The washing device is used as an independent washing process, which includes the following steps:

[0035] S1: Close the cleaning liquid discharge port 5, continuously inject cleaning liquid from the cleaning liquid inlet 3, and the cleaning liquid will flow down along the screw conveyor 1 and flow into the outer cylinder 6;

[0036] S2: Inject solid polyphenylene sulfide resin from the upper end of the inner cylinder 7 into the feeding mechanism 200, and the solid polyphenylene sulfide resin flows into the outer cylinder 6 from the lower end of the inner cylinder 7 and is infiltrated by the cleaning liquid in the outer cylinder 6;

[0037] S3: After the solid-phase polyphenylene sulfide resin is infiltrated, it is settled from the feeding port 4 into the screw conveyor 1, the screw in the screw conveyor 1 rotates to convey the solid-phase polyphenylene sulfide resin to the discharging port 2 at the upper end, and in the screw conveyor 1, the cleaning liquid flows downward and the solid-phase polyphenylene sulfide resin is conveyed upward, the flow directions of the two are opposite, and the two are mixed and washed;

[0038] S4: The solid-phase polyphenylene sulfide resin after washing flows out from the discharging port 2, and the cleaned cleaning liquid is intercepted by the filter screen 801, and then flows out from the overflow port 8 and is recovered. The whole process is operated in a closed manner, so that an automatic and continuous washing process is realized.

[0039] In addition, after the cleaning is completed, the injection of the cleaning liquid is stopped, the cleaning liquid discharge port 5 is opened, the cleaning liquid can be emptied from the washing device, the maintenance port 9 is opened, and the inside of the device is convenient for maintenance.

[0040] The washing liquid includes but is not limited to one or more of water, an organic solvent, an acid solution and a base solution, and different temperatures and concentrations of the washing liquid can be adjusted to meet the personalized needs of customers for product quality and realize different washing effects.

[0041] Example Two

[0042] Based on Example One, the difference between Example Two is that:

[0043] Please refer to Figure 4 As shown in the figure, the polyphenylene sulfide washing system is provided with no less than two washing devices according to the need of washing effect. As shown in the figure, Figure 4 Three washing devices can be used, and the three washing devices are connected in sequence, that is, the discharging port 2 of the previous washing device is connected with the feeding port 4 of the next washing device, to form a combined washing process.

[0044] In the washing system, the same washing liquid can be introduced into the three washing devices, such as introducing a single base solution into the three washing devices, to realize multi-stage washing and improve the washing effect.

[0045] In addition, different washing liquids can be introduced into the three washing devices, such as introducing an acid solution, a base solution and an organic solvent into the three washing devices respectively, to realize continuous acidification, alkalization or solvent leaching and other purification treatments, and improve the use performance of the product.

[0046] The washing liquid includes but is not limited to one or more of water, an organic solvent, an acid solution and a base solution, and different temperatures and concentrations of the washing liquid can be adjusted to meet the personalized needs of customers for product quality and realize different washing effects.

[0047] Through the above-mentioned embodiments, the polyphenylene sulfide washing device of the present application overcomes the deficiencies of the prior art, such as repeated slurry washing of polyphenylene sulfide, rough and single washing device, low degree of continuous, large consumption of washing liquid, generation of much high-organic and high-salt waste liquid, poor economic benefit, and the like, and can realize continuous and efficient cleaning of polyphenylene sulfide products, greatly save the amount of cleaning liquid, reduce the generation of waste liquid, and is simple to operate, green and environmentally friendly.

[0048] In the description of the present specification, the description referring to the terms "one embodiment", "an example", "a specific example", and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0049] The above-disclosed preferred embodiments of the present application are only used to help explain the present application. The preferred embodiments do not describe all the details, nor limit the present application to only the specific embodiments described. Obviously, many modifications and variations can be made according to the content of the present specification. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can well understand and utilize the present application. The present application is limited only by the claims and their full scope and equivalents.

Claims

1. A polyphenylene sulfide resin washing apparatus characterized by comprising: The washing device comprises a washing mechanism (100) for washing solid-phase polyphenylene sulfide resin and a feeding mechanism (200) for feeding the polyphenylene sulfide resin into the washing mechanism (100); The washing mechanism (100) comprises a screw conveyor (1) which is arranged obliquely, the upper end of the screw conveyor (1) is provided with a discharge port (2) and a cleaning liquid inlet (3), and the lower end of the screw conveyor (1) is provided with a feeding port (4) and a cleaning liquid discharge port (5); The feeding mechanism (200) is arranged at the feeding port (4) of the screw conveyor (1), the feeding mechanism (200) comprises an outer cylinder (6) and an inner cylinder (7), the upper end surface of the outer cylinder (6) is closed, the lower end of the outer cylinder (6) is communicated with the feeding port (4), the peripheral surface of the upper end of the outer cylinder (6) is provided with an overflow port (8), and a filter screen (801) is arranged in the overflow port (8); the inner cylinder (7) has an open structure at both ends, the upper end of the inner cylinder (7) is fixedly connected with the upper end surface of the outer cylinder (6), the lower end of the inner cylinder (7) extends into the lower end of the outer cylinder (6), and the lower end of the inner cylinder (7) is provided with a trumpet port (701); The upper end of the outer cylinder (6) is provided with a vapor-liquid separator (10), and the vapor-liquid separator (10) is communicated with the cavity in the outer cylinder (6).

2. The polyphenylene sulfide resin washing apparatus according to claim 1, wherein The peripheral surface of the screw conveyor (1) is provided with an inspection port (9).

3. The polyphenylene sulfide resin washing apparatus according to claim 1, wherein The oblique angle of the screw conveyor (1) is 15-45° with the horizontal plane.

4. Use of a polyphenylene sulfide resin washing apparatus according to any one of claims 1 to 3, characterized in that, The washing device is used as an independent washing process, and comprises the following steps: S1: closing the cleaning liquid discharge port (5), continuously feeding cleaning liquid from the cleaning liquid inlet (3), and flowing the cleaning liquid along the screw conveyor (1) and into the outer cylinder (6); S2: feeding the solid-phase polyphenylene sulfide resin into the feeding mechanism (200) from the upper end of the inner cylinder (7), flowing the solid-phase polyphenylene sulfide resin into the outer cylinder (6) from the lower end of the inner cylinder (7), and being soaked by the cleaning liquid in the outer cylinder (6); S3: after the solid-phase polyphenylene sulfide resin is soaked, the solid-phase polyphenylene sulfide resin is settled into the screw conveyor (1) from the feeding port (4), the screw rotates in the screw conveyor (1), the solid-phase polyphenylene sulfide resin is conveyed to the discharge port (2) at the upper end, the cleaning liquid flows downward in the screw conveyor (1), the solid-phase polyphenylene sulfide resin is conveyed upward, the flowing directions of the two are opposite, and mixed washing is performed; S4: the solid-phase polyphenylene sulfide resin after washing flows out from the discharge port (2), and the cleaned cleaning liquid is intercepted by the filter screen (801) and then flows out from the overflow port (8) and is recovered.

5. Use of a polyphenylene sulfide resin washing apparatus according to claim 4, characterized by A plurality of the washing devices are arranged, the number of the washing devices is not less than two, and the washing devices are connected in sequence, that is, the discharge port (2) of a previous washing device is connected with the feeding port (4) of a next washing device, so as to form a combined washing process.

6. Use of a polyphenylene sulfide resin washing apparatus according to claim 5, characterized by The same washing liquid is fed into the plurality of washing devices, so as to realize multi-stage washing.

7. Use of a polyphenylene sulfide resin washing apparatus according to claim 5, characterized by Different washing liquids are fed into the plurality of washing devices, so as to realize multi-dimensional purification washing.

8. Use of a polyphenylene sulfide resin washing apparatus according to claim 6 or 7, characterized in that, The washing liquid comprises one or more of water, an organic solvent, an acid solution and an alkali solution.

Images