Pneumatic conveying system for particle materials

Abstract

According to the pneumatic conveying system for the particle materials, a traditionally-designed stock bin structure is improved, and the whole pneumatic conveying system comprises the draught fan used for providing conveying power, the stock bin device used for storing the particle materials, the material conveying pipeline allowing the particles to pass through and the integrated control system capable of automatically controlling the material conveying pipeline. The heat exchanger assembly is arranged in the stock bin of the stock bin device, to-be-output particle materials stored in the stock bin are cooled through the heat exchanger assembly, materials entering a conveying pipeline can be temporarily and rapidly cooled through the design of a heat exchanger, and the situation that the positions of valves are damaged by the particle materials with the original high temperature is avoided; by means of the design, the system can adopt a control valve with common tolerance performance, a valve special for high temperature does not need to be installed, and the structural cost of the valve adopted in the system is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of organic material production and processing technology, and more specifically, to a pneumatic conveying system for particulate materials. Background Technology

[0002] With increasing domestic and international demand, domestic facilities for LDPE / EVA production are constantly expanding and being newly built. During the LDPE / EVA production process, after polymerization and granulation, a large amount of volatile organic compounds (VOCs) such as ethylene and vinyl acetate remain in the particles and continue to precipitate. The extruded granules are at high temperatures and contain a certain amount of dust, all of which can easily damage valves.

[0003] To address these equipment safety issues, a qualified pneumatic conveying system for granular materials is essential. Currently, most pneumatic conveying systems use a large amount of air to backflush the granular materials, removing volatiles and dust. Furthermore, the valves on the pipelines are mostly high-temperature resistant valves to address the problem of valve damage caused by the high temperature of the granular materials. However, for practical production considerations, the cost of such high-parameter standard valves is much higher than that of ordinary valves, which is not conducive to the cost optimization of the system.

[0004] In summary, existing pneumatic conveying systems for processing organic polymer materials suffer from the technical problem of high valve costs. Utility Model Content

[0005] The technical problem to be solved by this utility model is the high cost of valves in existing pneumatic conveying systems for processing organic polymer materials.

[0006] To address the aforementioned problems, this utility model provides a pneumatic conveying system for transporting organic polymer granular materials. The system includes multiple silo devices, a blower device, a conveying pipeline, and a control valve assembly installed on the conveying pipeline. Each silo device is connected to the blower device via the conveying pipeline. Each silo device includes a silo shell and a heat exchanger assembly fitted to the silo shell, through which the material inside the silo shell is cooled.

[0007] This utility model provides a novel pneumatic conveying system for granular materials that improves upon the traditional silo design. The system comprises a blower providing conveying power, a silo for storing granular materials, a conveying pipeline for accommodating the granules, and an automatic control mechanism for the conveying pipeline. A heat exchanger assembly is installed on the silo shell to cool the material stored in the silo. The heat exchanger design enables rapid and temporary cooling of the material entering the conveying pipeline, preventing damage to valves from the high-temperature granular materials. This design allows the system to use standard-performance control valves instead of high-temperature specialized valves, effectively reducing the structural cost of valves within the system.

[0008] As a preferred embodiment, the heat exchanger assembly includes U-shaped heat exchange tubes and utilizes circulating cooling water as the cooling medium. This design optimizes the specific structural design of the heat exchanger assembly, employing a U-shaped tube heat exchanger throughout. The U-shaped tubes increase the contact area between the heat exchange tubes and the particulate material, thereby improving the cooling effect.

[0009] As a preferred embodiment, the heat exchanger assembly further includes a mounting side plate, which is fixed to one side of the U-shaped heat exchange tube to protect it. Fasteners are provided on the edge of the mounting side plate to secure the U-shaped heat exchange tube to the hopper. Because the heat exchange tube itself has a relatively complex pipe structure, and to ensure heat exchange efficiency, the tube diameter cannot be too large. To protect the heat exchange tube structure and prevent damage from impacts, a mounting side plate is provided on one side of the U-shaped heat exchange tube. This plate structure protects the heat exchange tube by adhering it to the hopper, and fasteners are provided on the mounting side plate to facilitate the installation and fixation of the heat exchange tube to the hopper.

[0010] As a preferred embodiment, each of the silo devices is connected to a fan device at its output end, and the output end pipes of each silo device are connected in parallel. This design optimizes the output of the silos by connecting a fan to one end of the output of each silo, and the parallel connection between the silos facilitates independent control while ensuring continuous output of material particles.

[0011] As a preferred embodiment, each of the silo devices is equipped with a three-way output pipe at its output end. Each three-way output pipe includes a main pipe connected to the blower device and two branch pipes split by a three-way valve. Each branch pipe is equipped with a control valve to control the output of each branch pipe separately. This design further optimizes the overall system by providing a three-way output pipe at the output end in addition to the blower at the silo output end, facilitating independent control of the air supply.

[0012] As a preferred embodiment, the system includes six sets of parallel-connected silo units and a blower unit. Three main drive blowers are installed on the main pipeline connecting each silo unit to provide power for material feeding and mixing. This design further optimizes the system's airflow control; in addition to the blower at the silo outlet, a main drive blower is installed on the main pipeline to provide the system's primary power output.

[0013] As a preferred embodiment, the main drive fan is a magnetically levitated variable frequency regulating fan, and the control valves include a rotary control valve and a reversing valve. This design optimizes the system's fan and control valves, resulting in significant energy savings compared to traditional Roots blowers, and also provides higher system reliability.

[0014] As a preferred embodiment, an extruder and a discharger are respectively installed at both ends of the main pipeline connecting each of the aforementioned silo devices, for pre-processing of materials and unloading of materials, respectively. This design adaptively optimizes the system's pre- and post-processing, with an extruder installed at the pre-processing stage and a discharger installed at the post-processing stage of the pipeline. Attached Figure Description

[0015] Figure 1 A schematic diagram of the overall structure of a pneumatic conveying system for granular materials provided by this utility model;

[0016] Figure 2 for Figure 1 A partial structural diagram of the heat exchanger assembly of a pneumatic conveying system for medium-sized particles;

[0017] Figure 3 for Figure 1 A partial structural diagram of the other side of the heat exchanger assembly of a medium-particle material pneumatic conveying system.

[0018] in, Figures 1-3 middle:

[0019] 1. Hopper shell; 2. U-shaped heat exchange tube; 3. Pump; 4. Three-way output pipeline; 5. Main drive fan; 6. Fan unit; 7. Extruder; 8. Unloader; 9. Mounting side plate; 10. Fasteners. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] Before providing a detailed explanation of the working principle of this utility model, further clarification is needed regarding its description: In this description, terms such as "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, an indirect connection through an intermediate medium, or a welded connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] refer to Figures 1-3 The following examples illustrate this. Figure 1 A schematic diagram of the overall structure of a pneumatic conveying system for granular materials provided by this utility model; Figure 2 for Figure 1 A partial structural diagram of the heat exchanger assembly of a pneumatic conveying system for medium-sized particles; Figure 3 for Figure 1 A partial structural diagram of the other side of the heat exchanger assembly of a medium-particle material pneumatic conveying system.

[0024] The particulate material pneumatic conveying system provided in this embodiment is used for conveying organic polymer particulate materials. It includes multiple silo devices, a blower device 6, a conveying pipeline, and a control valve assembly installed on the conveying pipeline. The silo devices are all connected to the blower device 6 through the conveying pipeline. Each silo device includes a silo shell 1 and a heat exchanger assembly installed inside the silo shell 1. The heat exchanger assembly cools the material inside the silo shell 1.

[0025] This utility model provides a novel pneumatic conveying system for granular materials that improves upon the traditional silo design. The overall pneumatic conveying system includes a fan for providing conveying power, a silo device for storing granular materials, a conveying pipeline for accommodating the granules, and an automatic control mechanism for the conveying pipeline. A heat exchanger assembly is installed inside the silo shell 1 of the silo device to cool the granular materials to be output stored in the silo. Due to the design of the heat exchanger, the material entering the conveying pipeline can be temporarily and rapidly cooled, avoiding damage to the valve positions caused by the originally high-temperature granular materials. Through this design, the system can use control valves with ordinary resistance performance without the need to install high-temperature special valves, effectively reducing the structural cost of valves used in the system.

[0026] In the technical solution provided in this embodiment, the heat exchanger assembly includes a U-shaped heat exchange tube 2. This design optimizes the specific structural design of the heat exchanger assembly, and the entire assembly adopts a U-shaped tube heat exchanger. By increasing the contact heat exchange area between the heat exchange tube and the material inside the outer shell 1 of the silo through the U-shaped tube, the cooling effect is improved, thereby enhancing the heat exchange and cooling effect.

[0027] In the technical solution provided in this embodiment, the heat exchanger assembly also includes a mounting side plate 9. The mounting side plate 9 is fixed to one side of the U-shaped heat exchange tube 2 to protect the U-shaped heat exchange tube 2. Fasteners 10 are provided on the edge of the mounting side plate 9 to install and fix the U-shaped heat exchange tube 2 to the outer shell 1 of the hopper. Since the heat exchange tube itself has a relatively complex pipe structure, and in order to ensure the heat exchange effect, the diameter of the heat exchange tube cannot be too large. In order to protect the heat exchange tube structure and avoid damage from impacts, a mounting side plate 9 is provided on one side of the U-shaped heat exchange tube 2. The heat exchange tube is attached to the hopper for protection through the plate structure, and fasteners 10 are provided on the structure of the mounting side plate 9 to facilitate the installation and fixation of the heat exchange tube to the hopper.

[0028] In the technical solution provided in this embodiment, each silo device is connected to a fan device 6 at its output end pipeline, and the output end pipelines of each silo device are connected in parallel. This design optimizes the output of the silos by connecting a fan at one end of the output of each silo, and the silos are connected in parallel to each other, which facilitates independent control and also ensures continuous output of material particles.

[0029] In the technical solution provided in this embodiment, each silo device is equipped with a three-way output pipe 4 at its output end. Each three-way output pipe 4 includes a main pipe connected to the fan device 6, and two branch pipes that are split by a three-way valve. Each branch pipe is equipped with a control valve to control the output of the branch pipe separately. This design further optimizes the overall system by providing a three-way output pipe 4 at the output end in addition to the fan at the silo output end, facilitating independent control of the air supply.

[0030] The technical solution provided in this embodiment includes six sets of parallel-connected silo devices and a blower device 6. Three sets of main drive blowers 5 are installed on the main pipeline connecting each silo device to provide the power for feeding and mixing materials. This design further optimizes the air supply control of the system. In addition to the blower at the silo outlet, a main drive blower 5 is installed on the main pipeline to provide the main power output of the system.

[0031] In the technical solution provided in this embodiment, the main drive fan 5 is a magnetic levitation variable frequency regulating fan, and the control valves include a rotary control valve and a reversing valve. This design optimizes the system's fan and control valves, resulting in significant energy savings compared to traditional Roots blowers, and also provides higher system reliability.

[0032] In the technical solution provided in this embodiment, an extruder 7 and a discharger 8 are respectively installed at both ends of the main road connecting each silo device, for pre-processing of materials and unloading of materials, respectively. This design adaptively optimizes the pre- and post-processing of the system, with an extruder 7 installed at the front end and a discharger installed at the rear end of the pipeline.

[0033] Although the disclosure is as stated above, the scope of protection of this disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this utility model.

Claims

1. A pneumatic conveying system for granular materials, used for conveying organic polymer granular materials, characterized in that, It includes multiple silo devices and a fan device (6), a conveying pipeline and a control valve assembly installed on the conveying pipeline. The silo devices are all connected to the fan device (6) through the conveying pipeline. The silo devices all include a silo shell (1) and a heat exchanger assembly installed inside the silo shell (1) to cool the material inside the silo shell (1).

2. The pneumatic conveying system for granular materials according to claim 1, characterized in that, The heat exchanger assembly includes a U-shaped heat exchange tube (2), and circulating cooling water is used to deliver heat exchange liquid to the U-shaped heat exchange tube (2) to cool the particulate material in the silo.

3. The pneumatic conveying system for granular materials according to claim 2, characterized in that, The heat exchanger assembly also includes a mounting side plate (9), which is fixed to one side of the U-shaped heat exchange tube (2) to protect the U-shaped heat exchange tube (2). The edge of the mounting side plate (9) is provided with fasteners (10), which are used to install and fix the U-shaped heat exchange tube (2) to the outer shell of the hopper (1).

4. The pneumatic conveying system for granular materials according to claim 3, characterized in that, Each of the silo devices is connected to a blower device (6) in its output pipe, and the output pipes of each silo device are connected in parallel.

5. The pneumatic conveying system for granular materials according to claim 4, characterized in that, Each of the aforementioned silo devices is provided with a three-way output pipe (4) at its output end. Each three-way output pipe (4) includes a main pipe connected to the blower device (6) and two branch pipes that are diverted by a three-way valve. Each of the branch pipes is provided with a control valve to control the output of the branch pipes respectively.

6. The pneumatic conveying system for granular materials according to claim 5, characterized in that, It includes 6 sets of parallel silo devices and a blower device (6). Three sets of main drive blowers (5) are installed on the trunk line connecting each of the silo devices to provide power for feeding and mixing materials.

7. The pneumatic conveying system for granular materials according to claim 6, characterized in that, The main drive fan (5) is a magnetic levitation variable frequency regulating fan, and the control valve includes a rotary control valve and a reversing valve.

8. The pneumatic conveying system for granular materials according to claim 6, characterized in that, An extruder (7) and a discharger (8) are respectively installed at both ends of the main road connecting each of the aforementioned silo devices.

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