Fan air inlet preheating device based on PVC production
Patent Information
- Application Number
- CN202522114253.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-09-30
AI Technical Summary
以包头地区为例，冬季平均气温-11.2℃，加热至120℃需消耗大量蒸汽；而聚合工序产生的70℃母液水及蒸汽凝液水需降温至60℃以下才能进入深化处理，其热量通过冷却装置白白浪费，其缺少用于聚合工序等产生热量回收利用，无法通过对应工序的热交换来对空气进行预热的设备，不能有效减少蒸汽消耗和热能浪费
[0013]与现有技术相比，本实用新型的有益效果是：预热箱内部通过分隔板一和分隔板二分隔成S形风道，空气在风机与分隔部作用下沿S形路径运动，增加了空气与换热管的接触时间，从而提高了换热效率；换热管内部开设内螺纹，增加了液体与换热管内壁的接触面积，有助于提高热交换效率；换热管外侧套设多个翅片，且相邻翅片外侧交错固接导向板，使空气在穿过翅片时形成S形路径，进一步增加了空气与翅片的接触时间和面积，提升换热效果；密封盖板通过限位板与预热箱外侧的锁钩互锁，配合螺栓固定；安装时，将密封盖板向预热箱侧边推动，限位插销插入固定盒中部引导限位板，使螺纹杆与限位板中部通孔对应，限位板推动锁钩带动连接杆和滑板压缩弹簧，锁钩端部与限位板错位后弹簧驱动锁钩复位卡住限位板，再旋拧螺母即可完成安装，无需持续托拆分时，拉动锁钩并安装垫块即可分离，操作方便快捷。
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Figure CN224786027U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of air heat exchange technology, specifically a preheating device for the air inlet of a fan based on PVC production. Background Technology
[0002] In the PVC production process, the drying step requires drying wet resin with hot air. In traditional processes, a blower directly draws in ambient air, which is then heated to 120°C by a steam heater. Taking Baotou as an example, the average winter temperature is -11.2°C, and heating to 120°C requires a large amount of steam. Meanwhile, the 70°C mother liquor and steam condensate generated in the polymerization process need to be cooled to below 60°C before entering the further processing stage. The heat generated by these processes is wasted through cooling devices. There is a lack of equipment for recovering and utilizing the heat generated in the polymerization process and for preheating the air through heat exchange in the corresponding processes, which fails to effectively reduce steam consumption and heat waste. Utility Model Content
[0003] The purpose of this invention is to provide a preheating device for the air inlet of a fan based on PVC production, so as to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a preheating device for the air inlet of a fan based on PVC production, comprising:
[0005] A preheating box, wherein an installation port is provided on one side of the preheating box, and a partition is installed inside the preheating box to divide the interior of the preheating box into an S-shaped air duct;
[0006] A heat exchange assembly is placed inside the preheating box. The heat exchange assembly includes a sealing cover plate installed at the end of the installation port. A limiting plate is fixed to the outside of the sealing cover plate. A locking hook that interlocks with the limiting plate is installed on the outside of the preheating box for pre-tightening and positioning the sealing cover plate. Multiple heat exchange sections are provided on one side of the sealing cover plate. Each heat exchange section includes a heat exchange tube for heating air.
[0007] Preferably, the preheating box is provided with an air inlet and an air outlet at both ends, and a filter screen is installed in the air inlet.
[0008] Preferably, a fixed box is fixedly connected to the outside of the preheating box, and connecting rods are slidably connected to both sides of the fixed box. One end of the connecting rod is rotatably connected to a sliding plate that is slidably connected to the fixed box, and a threaded rod is fixedly connected to the middle of the fixed box.
[0009] Preferably, a spring is sleeved on the outer side of the connecting rod and between the slide plate and the inner wall of the fixing box; the locking hook is fixedly connected to the end of the connecting rod; two limiting pins are fixedly connected to one end of the limiting plate; and a through hole that mates with the threaded rod is opened in the middle of the limiting plate.
[0010] Preferably, the partition includes a second partition plate fixed inside the preheating box and a first partition plate located above the second partition plate.
[0011] Preferably, the heat exchange section is fixedly connected to the heat exchange tube in the middle of the sealing cover plate, the heat exchange tube has an internal thread, and the two ends of the heat exchange tube are respectively fixedly connected to an inlet pipe and an outlet pipe.
[0012] Preferably, the heat exchange tube is fitted with multiple fins on its outer side, and guide plates are staggered and fixed to the outer sides of two adjacent fins.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: The preheating box is divided into an S-shaped air duct by partition plate one and partition plate two. Air moves along the S-shaped path under the action of the fan and the partition, increasing the contact time between the air and the heat exchange tubes, thereby improving heat exchange efficiency. Internal threads are opened inside the heat exchange tubes, increasing the contact area between the liquid and the inner wall of the heat exchange tubes, which helps to improve heat exchange efficiency. Multiple fins are sleeved on the outside of the heat exchange tubes, and guide plates are staggered and fixed to the outside of adjacent fins, causing the air to form an S-shaped path when passing through the fins, further increasing the contact time between the air and the fins. The contact time and area of the plates are increased to improve the heat exchange effect; the sealing cover plate is interlocked with the locking hook on the outside of the preheating box by the limiting plate and fixed with bolts; during installation, push the sealing cover plate to the side of the preheating box, insert the limiting pin into the middle of the fixing box to guide the limiting plate, so that the threaded rod corresponds with the through hole in the middle of the limiting plate. The limiting plate pushes the locking hook to drive the connecting rod and the sliding plate to compress the spring. After the end of the locking hook is misaligned with the limiting plate, the spring drives the locking hook to reset and lock the limiting plate. Then, tighten the nut to complete the installation. No continuous support is needed. When disassembling, pull the locking hook and install the pad to separate. The operation is convenient and quick. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model;
[0015] Figure 2 This is a schematic diagram of the structure of the inlet pipe and outlet pipe of this utility model;
[0016] Figure 3 This is a schematic diagram of the structure of the guide plate of this utility model;
[0017] Figure 4 This is a schematic diagram of the structure of the locking hook of this utility model;
[0018] Figure 5 This is a schematic diagram of the internal structure of the heat exchange tube of this utility model;
[0019] Figure 6 This is a schematic diagram of the internal structure of the preheating box of this utility model.
[0020] In the diagram: 1. Preheating box; 2. Sealing cover; 3. Fins; 4. Guide plate; 5. Heat exchange tube; 6. Internal thread; 7. Partition plate one; 8. Partition plate two; 9. Water inlet pipe; 10. Water outlet pipe; 11. Locking hook; 12. Limiting plate; 13. Spring; 14. Threaded rod; 15. Limiting pin; 16. Slide plate; 17. Connecting rod; 18. Filter screen; 19. Fixing box. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] Please see Figure 1 , 2 As shown in Figures 3, 4, 5, and 6, this utility model provides a technical solution: a preheating device for a fan inlet based on PVC production, comprising: a preheating box 1, an installation port on one side of the preheating box 1, and a partition installed inside the preheating box 1 to divide the interior of the preheating box 1 into an S-shaped air duct; a heat exchange assembly placed inside the preheating box 1, the heat exchange assembly including a sealing cover plate 2 installed at the end of the installation port, a limiting plate 12 fixedly connected to the outside of the sealing cover plate 2, a locking hook 11 interlocked with the limiting plate 12 installed on the outside of the preheating box 1 for pre-tightening and positioning of the sealing cover plate 2, and three heat exchange sections arranged sequentially from top to bottom on one side of the sealing cover plate 2, each heat exchange section including a heat exchange tube 5 for heating the air.
[0023] It should be noted that in this embodiment, the 70°C mother liquor water or steam condensate water generated in the polymerization process is introduced into the heat exchange tube 5. One end of the preheating box 1 is connected to the air inlet of the fan, so that the air comes into contact with the heat exchange tube 5 inside the preheating box 1 to achieve heat exchange, thereby preheating the air. Under the action of the fan and the partition, the air moves along an S-shaped path inside the preheating box 1. The S-shaped path increases the contact time between the air and the heat exchange tube 5, thereby improving the heat exchange efficiency. When the heat exchange tube 5 needs maintenance, the sealing cover 2 is separated from the preheating box 1 to remove the heat exchange tube 5. After cleaning, the sealing cover 2 is installed back into the preheating box 1. After pre-tightening by the engagement of the limiting plate 12 and the locking hook 11, it is fixed with bolts.
[0024] In one embodiment, the preheating box 1 is provided with an air inlet and an air outlet at both ends, and a filter screen 18 is installed in the air inlet. The partition includes a partition plate 2 8 fixed inside the preheating box 1 and a partition plate 1 7 located above the partition plate 2 8.
[0025] It should be noted that in this embodiment, air enters the preheating box 1 through the filter screen 18. Since both partition plate 7 and partition plate 8 are fixedly connected inside the preheating box 1, and one end of partition plate 8 has a slope to guide the air inlet, while one end of partition plate 7 has a slope to guide the air outlet, air enters through the bottom of partition plate 8, then flows between partition plate 8 and partition plate 7, and finally exits through the top of partition plate 7 from the air outlet.
[0026] In one embodiment, a fixed box 19 is fixedly connected to the outside of the preheating box 1. Connecting rods 17 are slidably connected to both sides of the fixed box 19. One end of the connecting rod 17 is rotatably connected to a sliding plate 16 that is slidably connected to the fixed box 19. A threaded rod 14 is fixedly connected to the middle of the fixed box 19. A spring 13 is sleeved on the outside of the connecting rod 17 and between the sliding plate 16 and the inner wall of the fixed box 19. A locking hook 11 is fixedly connected to the end of the connecting rod 17. Two limiting pins 15 are fixedly connected to one end of the limiting plate 12. A through hole that mates with the threaded rod 14 is opened in the middle of the limiting plate 12.
[0027] It should be noted that, in this embodiment, when installing the sealing cover 2 and the preheating box 1, the sealing cover 2 is pushed towards the side of the preheating box 1, causing the limiting pin 15 to insert into the middle of the fixing box 19, thereby guiding the limiting plate 12 so that the threaded rod 14 corresponds to the through hole in the middle of the limiting plate 12. The limiting plate 12 pushes the locking hook 11 from both ends, and the locking hook 11 drives the connecting rod 17 to drive the sliding plate 16 to compress the spring 13. When the end of the locking hook 11 is misaligned with the limiting plate 12, the spring 13 drives the locking hook 11 to reset, and the locking hook 11 is locked at the end of the limiting plate 12, thereby limiting and locking the limiting plate 12. Then, the nut on the outside of the threaded rod 14 can be tightened, so that it does not need to be continuously lifted or supported during installation. When disassembling, the locking hook 11 is pulled to one end, and the mounting pad between the fixing box 19 and the locking hook 11 is separated.
[0028] In one embodiment, the heat exchange section is fixed to the heat exchange tube 5 in the middle of the sealing cover plate 2. The heat exchange tube 5 has an internal thread 6, and the two ends of the heat exchange tube 5 are respectively fixed to the water inlet pipe 9 and the water outlet pipe 10. Multiple fins 3 are sleeved on the outside of the heat exchange tube 5, and guide plates 4 are alternately fixed to the outside of two adjacent fins 3.
[0029] It should be noted that in this embodiment, the internal thread 6 can increase the contact area between the liquid and the internal thread 6, which can increase the heat exchange efficiency. In addition, the intersecting guide plates 4 can form an S-shaped path when water and air pass between the two fins 3, so that the air can have more contact with the fins 3, thereby improving its heat exchange efficiency.
[0030] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They 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. Therefore, they should not be construed as limitations on this utility model.
[0031] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.
[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A fan inlet preheating device based on PVC production, characterized in that: include: A preheating box (1) is provided with an installation port on one side, and a partition is installed inside the preheating box (1) to divide the interior of the preheating box (1) into an S-shaped air duct. A heat exchange assembly is placed inside the preheating box (1). The heat exchange assembly includes a sealing cover plate (2) installed at the end of the installation port. A limiting plate (12) is fixed to the outside of the sealing cover plate (2). A locking hook (11) that interlocks with the limiting plate (12) is installed on the outside of the preheating box (1) for pre-tightening and positioning of the sealing cover plate (2). A plurality of heat exchange sections are provided on one side of the sealing cover plate (2). The heat exchange section includes a heat exchange tube (5) for heating air.
2. The preheating device for the air inlet of a fan based on PVC production according to claim 1, characterized in that: The preheating box (1) is provided with an air inlet and an air outlet at both ends, and a filter screen (18) is installed in the air inlet.
3. The preheating device for the air inlet of a fan based on PVC production according to claim 1, characterized in that: A fixed box (19) is fixedly connected to the outside of the preheating box (1). A connecting rod (17) is slidably connected to both sides of the fixed box (19). One end of the connecting rod (17) is rotatably connected to a sliding plate (16) that is slidably connected to the fixed box (19). A threaded rod (14) is fixedly connected to the middle of the fixed box (19).
4. The preheating device for the air inlet of a fan based on PVC production according to claim 3, characterized in that: A spring (13) is sleeved on the outside of the connecting rod (17) and between the slide plate (16) and the inner wall of the fixing box (19). The locking hook (11) is fixed to the end of the connecting rod (17). Two limiting pins (15) are fixed to one end of the limiting plate (12), and a through hole that mates with the threaded rod (14) is opened in the middle of the limiting plate (12).
5. A preheating device for a fan inlet based on PVC production according to claim 1, characterized in that: The partition includes a second partition plate (8) fixed inside the preheating box (1) and a first partition plate (7) located above the second partition plate (8).
6. A preheating device for a fan inlet based on PVC production according to claim 1, characterized in that: The heat exchange section is fixed to the heat exchange tube (5) in the middle of the sealing cover plate (2). The heat exchange tube (5) has an internal thread (6) inside, and the two ends of the heat exchange tube (5) are respectively fixed to the water inlet pipe (9) and the water outlet pipe (10).
7. A fan inlet preheating device based on PVC production according to claim 6, characterized in that: The heat exchange tube (5) is fitted with multiple fins (3) on its outer side, and guide plates (4) are alternately fixed to the outer sides of two adjacent fins (3).