A halogen-free flame retardant masterbatch uniform drying device

Abstract

This utility model relates to the technical field of flame retardant masterbatch processing equipment, and discloses a uniform drying device for halogen-free flame retardant masterbatch, including a vacuum rake dryer. The vacuum rake dryer consists of an outer cylinder and an inner liner. The outer cylinder is sleeved on the outside of the inner liner. An air inlet pipe is fixedly connected to the outer cylinder, and a feed pipe and a discharge pipe are fixedly connected to the inner liner. It also includes a nozzle, which is installed on the air inlet pipe through a connector. This utility model uses the nozzle to make the steam inside the outer cylinder uniformly distributed, thereby promoting uniform heating of the inner liner. At the same time, the nozzle works with the internal rake to stir the flame retardant masterbatch, achieving uniform and rapid drying of the material. In addition, the negative pressure component draws air into the air hood, forming a downward suction force in the discharge pipe, accelerating the discharge of the flame retardant masterbatch, effectively improving the overall processing efficiency of the vacuum rake dryer.

Description

Technical Field

[0001] This utility model relates to the technical field of flame retardant masterbatch processing equipment, specifically a halogen-free flame retardant masterbatch uniform drying device. Background Technology

[0002] Halogen-free flame retardant masterbatch is a new type of inorganic fireproof material that has been developed in recent years. Its characteristics are that it does not contain toxic elements such as halogens and phosphorus, and has less environmental harm. At the same time, it has good fire resistance and high thermal stability, so it is widely used in industries such as construction, building materials, power, metallurgy, and petrochemicals.

[0003] In the process of producing halogen-free flame retardant masterbatch, a drying device is required for drying. Traditional drying devices mostly use vacuum rake dryers. The working process includes putting the flame retardant masterbatch into the inner drum, then introducing steam into the outer drum of the vacuum rake dryer, and stirring the material with stirring blades to heat and dry it.

[0004] However, in practical applications, although the vacuum rake dryer can dry flame retardant masterbatch, the lack of guidance effect after the steam enters the outer cylinder results in uneven distribution of steam inside the outer cylinder, which in turn causes the flame retardant masterbatch inside the inner liner to not be dried evenly. Secondly, the discharge efficiency of the flame retardant masterbatch after drying is low, which will affect the overall processing efficiency of the equipment in continuous production operations. Utility Model Content

[0005] This invention provides a uniform drying device for halogen-free flame retardant masterbatch. The device uses a nozzle to evenly diffuse steam from the inlet pipe to the outer cylinder, ensuring uniform heating of the inner surface and thus promoting the drying efficiency of the flame retardant masterbatch. Simultaneously, a negative pressure component is used to evacuate air from the dryer, creating a negative pressure environment that effectively improves the discharge efficiency of the flame retardant masterbatch, further enhancing the processing efficiency of the drying device. This solves the problems of insufficient uniformity and low discharge efficiency in existing drying devices mentioned in the background art.

[0006] This utility model provides the following technical solution:

[0007] A uniform drying device for halogen-free flame-retardant masterbatch includes a vacuum rake dryer, which consists of an outer cylinder and an inner liner. The outer cylinder is sleeved on the outside of the inner liner, and an air inlet pipe is fixedly connected to the outer cylinder. An inlet pipe and an outlet pipe are fixedly connected to the inner liner. The device also includes: a nozzle mounted on the air inlet pipe via a connector, wherein the nozzle guides the steam inside the outer cylinder when external steam enters through the air inlet pipe; and a guide hood fixedly connected to the outlet pipe, wherein a discharge pipe is fixedly connected to the end of the guide hood away from the outlet pipe. The guide hood is equipped with a negative pressure component, and when the negative pressure component is working, a negative pressure environment is formed inside the outlet pipe.

[0008] As a preferred embodiment of this utility model, the connector includes a positioning plate fixedly connected to the air intake pipe, the nozzle is inserted into the positioning plate, and a nut that abuts against the positioning plate is threaded onto the nozzle.

[0009] As a preferred technical solution of this utility model, the negative pressure component includes a vacuum pump fixedly installed on the vacuum rake dryer, the suction end of the vacuum pump is fixedly connected to a suction pipe, and the end of the suction pipe away from the vacuum pump is fixedly connected to the air guide shroud.

[0010] As a preferred embodiment of this utility model, the air inlet end of the suction pipe is set vertically and horizontally, and the air inlet end faces the discharge pipe.

[0011] As a preferred embodiment of this utility model, the air guide shroud is conical in shape, with its large end fixedly connected to the discharge pipe and its small end fixedly connected to the discharge pipe.

[0012] As a preferred embodiment of this utility model, a filter screen is fixedly installed inside the air guide hood, and the filter screen is located between the air extraction pipe and the air guide hood cavity.

[0013] As a preferred technical solution of this utility model, the nozzle is provided with a conical air guide surface, and the small end of the air guide surface faces the air inlet end of the air inlet pipe.

[0014] As a preferred embodiment of this utility model, an electromagnetic valve is fixedly sleeved on the discharge pipe, and the electromagnetic valve is located at the upper end of the air guide shroud.

[0015] Compared with the prior art, this utility model provides a uniform drying device for halogen-free flame retardant masterbatch, which has the following beneficial effects:

[0016] 1. In this halogen-free flame retardant masterbatch uniform drying device, the setting of connecting parts realizes the stable installation and optimized layout of the nozzle, which effectively improves its stability during use. At the same time, the bolt fixing method also provides convenience for the disassembly and maintenance of the nozzle.

[0017] 2. In this halogen-free flame-retardant masterbatch uniform drying device, by setting a negative pressure component, when the air pump draws air into the air hood, the airflow guides the downward suction force inside the discharge pipe, thereby improving the discharge efficiency of the inner liner and further enhancing the overall processing efficiency of the vacuum rake dryer. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0020] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0021] Figure 2 This is a cross-sectional view of the outer cylinder of this utility model;

[0022] Figure 3 This is a cross-sectional view of the intake pipe of this utility model;

[0023] Figure 4 This is an exploded view of a partial structure of the present invention;

[0024] Figure 5 This is a cross-sectional view of the discharge pipe of this utility model;

[0025] Figure 6 This is a cross-sectional schematic diagram of the air guide cover of this utility model.

[0026] In the diagram: 1. Vacuum rake dryer; 11. Outer cylinder; 12. Inner liner; 13. Air inlet pipe; 14. Feed pipe; 15. Discharge pipe; 2. Nozzle; 3. Positioning plate; 31. Nut; 4. Air guide hood; 5. Discharge pipe; 6. Air pump; 61. Air extraction pipe; 7. Filter screen. Detailed Implementation

[0027] To make the utility model's objectives, features, and advantages more apparent and understandable, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below 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 scope of protection of the present utility model.

[0028] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component centrally located at the same time.

[0029] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0030] Reference Figures 1-6 A uniform drying device for halogen-free flame retardant masterbatch includes a vacuum rake dryer 1, model PZG-1000. The vacuum rake dryer 1 consists of an outer cylinder 11 and an inner liner 12. The outer cylinder 11 is fitted over the outer side of the inner liner 12. Two air inlet pipes 13 are fixedly connected to the outer cylinder 11. An inlet pipe 14 and an outlet pipe 15 are fixedly connected to the inner liner 12. The inlet pipe 14 is located at the top of the inner liner 12 and is a three-way pipe. The flame retardant masterbatch enters through the upper end of the inlet pipe 14 and exits through the bottom. The inlet pipe 14 can also be connected to an external pipe on its side to achieve vacuuming of the inner liner 12 cavity. The outlet pipe 15 is located at the bottom of the inner liner 12. The device also includes a nozzle 2, which is installed on the inlet pipes 13 via a connector. The nozzle 2 has a conical air guide surface, and the small air guide surface... The nozzle 2 is a ZSTWC impact-type medium-speed water mist nozzle 2. When steam enters the outer cylinder 11 through the air inlet pipe 13, it is guided by the conical air guide surface, which allows the steam to diffuse evenly inside the outer cylinder 11, thereby promoting the uniform heating of the inner liner 12. When external steam enters the outer cylinder 11 through the air inlet pipe 13, the nozzle 2 is used to guide the steam inside the outer cylinder 11. The air guide hood 4 is fixedly connected to the discharge pipe 15. The end of the air guide hood 4 away from the discharge pipe 15 is fixedly connected to the discharge pipe 5. The air guide hood 4 is conical in shape, with the large end fixedly connected to the discharge pipe 15 and the small end fixedly connected to the discharge pipe 5. The conical design of the air guide hood 4 can prevent the flame retardant masterbatch inside the discharge pipe 15 from clogging. The air guide hood 4 is equipped with a negative pressure component. When the negative pressure component is working, a negative pressure environment is formed inside the discharge pipe 15.

[0031] Specifically, the nozzle 2 allows the steam inside the outer cylinder 11 to be evenly distributed, thereby promoting uniform heating of the inner liner 12. At the same time, the nozzle 2, in conjunction with the internal rake, stirs the flame retardant masterbatch, achieving uniform and rapid drying of the material. In addition, the negative pressure component draws air from the inside of the air guide hood 4, creating a downward suction force in the discharge pipe 15, accelerating the discharge of the flame retardant masterbatch, and effectively improving the overall processing efficiency of the vacuum rake dryer 1.

[0032] The connector includes a positioning plate 3 fixedly connected to the air intake pipe 13. The positioning plate 3 is circular in shape and can be installed inside the air intake pipe 13 by bolt fixing or welding. The nozzle 2 is inserted into the positioning plate 3, and the surface of the nozzle 2 is provided with a threaded groove. A nut 31 that abuts against the positioning plate 3 is threadedly connected to the threaded groove.

[0033] Specifically, the installation and optimized layout of the nozzle 2 are achieved through the connection, which effectively improves its stability during use. At the same time, the bolt fixing method also facilitates the disassembly and maintenance of the nozzle 2.

[0034] The negative pressure component includes a vacuum pump 6 fixedly installed on the vacuum rake dryer 1. The suction end of the vacuum pump 6 is fixedly connected to a suction pipe 61. The end of the suction pipe 61 away from the vacuum pump 6 is fixedly connected to the air guide shroud 4. The air inlet end of the suction pipe 61 is set vertically and horizontally, and the air inlet end faces the discharge pipe 15. By using the vertically and horizontally set suction pipe 61, the airflow path inside the discharge pipe 15 is optimized, so that when the vacuum pump 6 is working, a downward suction force is generated inside the discharge pipe 15, which accelerates the discharge of flame retardant masterbatch inside the inner liner 12.

[0035] Specifically, by setting up a negative pressure component, when the air pump 6 draws air into the air hood 4, the airflow guides the downward suction force inside the discharge pipe 15, thereby improving the discharge efficiency of the inner liner 12 and further enhancing the overall processing efficiency of the vacuum rake dryer 1.

[0036] A filter screen 7 is fixedly installed on the inner wall of the air guide shroud 4. The filter screen 7 is located between the air extraction pipe 61 and the cavity of the air guide shroud 4.

[0037] Specifically, the filter screen 7 effectively protects the air pump 6, preventing flame retardant masterbatch from entering its interior and causing damage, thereby significantly improving the safety of the air pump 6.

[0038] A solenoid valve is fixedly fitted on the discharge pipe 15, and the solenoid valve is located at the upper end of the air guide shroud 4.

[0039] Specifically, by setting the solenoid valve, when it is closed, the inner liner 12 remains sealed, which is conducive to the uniform heating of the flame retardant masterbatch; when the solenoid valve is opened, the inner liner 12 is connected to the inner cavity of the air guide shroud 4, and at this time, the air pump 6 is used to evacuate the air inside the air guide shroud 4, which can quickly realize the discharge of the flame retardant masterbatch.

[0040] In this invention, when installing the nozzle 2, the nozzle 2 is first inserted into the positioning plate 3, and then fixed by threaded connection of the nut 31 to the nozzle 2. After the nozzle 2 is fixed, the positioning plate 3 is installed inside the air inlet pipe 13 of the vacuum rake dryer 1. The positioning plate 3 can be installed in two ways: first, by welding the positioning plate 3 directly to the pipe wall; second, by welding an annular ring to the inside of the pipe wall, and then fixing the positioning plate 3 to the annular ring with bolts. The bolt connection method facilitates the subsequent disassembly and maintenance of the nozzle 2.

[0041] When drying the flame retardant masterbatch, the masterbatch is first fed into the inner liner 12 through the feed pipe 14. Then, the feed pipe 14 is sealed with an external baffle. After sealing, the external steam delivery pipe is connected to the air inlet pipe 13, and steam is introduced into it. When the steam enters the outer cylinder 11 through the air inlet pipe 13, it is uniformly diffused under the action of the conical guide surface of the nozzle 2, so that the surface of the inner liner 12 is uniformly heated. At this time, the drive motor of the vacuum rake dryer 1 is started, which drives the rake to rotate at a uniform speed to break up the flame retardant masterbatch in the inner liner 12 to promote its uniform heating and drying. During the drying process, the external vacuum pump is started at the same time to extract air through the feed pipe 14 and discharge the moisture-containing gas in the inner liner 12, which helps to improve the drying efficiency of the flame retardant masterbatch.

[0042] After the flame retardant masterbatch is dried, the operator opens the solenoid valve on the discharge pipe 15 through the external control switch and starts the air pump 6. When the air pump 6 draws air into the air guide hood 4, it forms a downward suction force in the discharge pipe 15, which causes the flame retardant masterbatch in the inner liner 12 to be quickly discharged into the discharge pipe 5 through the air guide hood 4, thereby improving the overall processing efficiency of the vacuum rake dryer 1.

[0043] It should be noted that components not described in detail in this article are existing technologies.

[0044] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model 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. Such 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 this utility model.

Claims

1. A uniform drying device for halogen-free flame-retardant masterbatch, comprising a vacuum rake dryer (1), wherein the vacuum rake dryer (1) is composed of an outer cylinder (11) and an inner liner (12), the outer cylinder (11) being sleeved on the outside of the inner liner (12), an air inlet pipe (13) being fixedly connected to the outer cylinder (11), and a feed pipe (14) and a discharge pipe (15) being fixedly connected to the inner liner (12), characterized in that, Also includes: The nozzle (2) is mounted on the air inlet pipe (13) via a connector. When external steam enters the outer cylinder (11) through the air inlet pipe (13), the nozzle (2) is used to guide the steam inside the outer cylinder (11); An air guide hood (4) is fixedly connected to the discharge pipe (15), and a discharge pipe (5) is fixedly connected to the end of the air guide hood (4) away from the discharge pipe (15). The air guide shroud (4) is equipped with a negative pressure component. When the negative pressure component is working, a negative pressure environment is formed inside the discharge pipe (15).

2. The halogen-free flame-retardant masterbatch uniform drying device according to claim 1, characterized in that, The connector includes a positioning plate (3) fixedly connected to the air inlet pipe (13), the nozzle (2) is inserted into the positioning plate (3), and the nozzle (2) is threaded with a nut (31) that abuts against the positioning plate (3).

3. The uniform drying device for halogen-free flame-retardant masterbatch according to claim 1, characterized in that, The negative pressure component includes a vacuum pump (6) fixedly installed on the vacuum rake dryer (1). The suction end of the vacuum pump (6) is fixedly connected to a suction pipe (61), and the end of the suction pipe (61) away from the vacuum pump (6) is fixedly connected to the air guide shroud (4).

4. The uniform drying device for halogen-free flame-retardant masterbatch according to claim 3, characterized in that, The air inlet of the suction pipe (61) is set vertically and horizontally, and the air inlet faces the discharge pipe (15).

5. The uniform drying device for halogen-free flame-retardant masterbatch according to claim 1, characterized in that, The air guide shroud (4) is conical in shape, with its large end fixedly connected to the discharge pipe (15) and its small end fixedly connected to the discharge pipe (5).

6. The halogen-free flame-retardant masterbatch uniform drying device according to claim 5, characterized in that, A filter screen (7) is fixedly installed inside the air guide hood (4), and the filter screen (7) is located between the air extraction pipe (61) and the cavity of the air guide hood (4).

7. The uniform drying device for halogen-free flame-retardant masterbatch according to claim 1, characterized in that, The nozzle (2) is provided with a conical air guide surface, and the small end of the air guide surface faces the air inlet end of the air inlet pipe (13).

8. The uniform drying device for halogen-free flame-retardant masterbatch according to claim 1, characterized in that, A solenoid valve is fixedly fitted on the discharge pipe (15), and the solenoid valve is located at the upper end of the air guide shroud (4).

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