Polymeric dry secondary conveying humidifier pure water recovery system
Patent Information
- Application Number
- CN202521888790.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-03
- Publication Date
- 2026-08-18
- Estimated Expiration
- 2035-09-03
AI Technical Summary
[0004]本申请实施例通过提供一种聚合干燥二次输送加湿器纯水回收系统，解决了现有技术中PVC树脂气力输送系统中因过饱和加湿导致大量纯水浪费的技术问题
本实用新型实施例采用了一种聚合干燥二次输送加湿器纯水回收系统，包括输送风机、换热器、过滤器、干燥热水槽和加湿装置；输送风机的输出端与换热器的第一输入端连接，换热器的第一输出端与过滤器的输入端连接；换热器的第二输入端与冷却水装置连接，换热器的第二输出端与干燥热水槽连接；过滤器的输出端连接于换热器和干燥热水槽之间；加湿装置的输出端连接于输送风机和换热器之间。还包括倒U型管道；换热器的第二输出端通过倒U型管道与干燥热水槽连接；过滤器的输出端连接于倒U型管道的输入端。通过输送风机能够将加湿装置的纯水通过压差输送至干燥热水槽中，并且本申请还设置有倒U型管道的防倒流结构。本申请解决了现有技术中PVC树脂气力输送系统中因过饱和加湿导致大量纯水浪费的技术问题，能够将富余纯水安全回收至干燥热水槽循环利用，在保障静电消除效果的同时，显著降低纯水单耗，并消除系统安全风险。
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Abstract
Description
Technical Field
[0001] This application relates to the field of pure water recovery technology, and in particular to a pure water recovery system for a polymer drying secondary conveying humidifier. Background Technology
[0002] In the production of polyvinyl chloride (PVC) resin, the dried powder needs to be transferred to the storage process via a pneumatic conveying system. To prevent the risk of combustion and explosion caused by static electricity accumulation in the PVC resin powder during transportation, the industry generally uses air humidification technology to eliminate static electricity: high-pressure instrument air is mixed with pure water through a two-fluid atomizing nozzle, and ultra-fine water mist is sprayed into the conveying pipeline, making the air in the pipeline supersaturated. When the supersaturated air comes into contact with the PVC resin powder, a micron-sized water film forms on its surface, which dissipates static electricity by enhancing surface conductivity.
[0003] During the operation of the humidification device, part of the pure water used is used to eliminate static electricity in the PVC resin, while the excess water is drained into the mother liquor water treatment system. This portion of pure water is not fully utilized, resulting in waste. If this portion of pure water were recycled to other pure water users within the device, the unit consumption of polymerized pure water could be reduced. Utility Model Content
[0004] This application provides a pure water recovery system for a polymer drying secondary conveying humidifier, which solves the technical problem of excessive pure water waste caused by oversaturation humidification in the existing PVC resin pneumatic conveying system.
[0005] This utility model provides a pure water recovery system for a polymer drying secondary conveying humidifier, including a conveying fan, a heat exchanger, a filter, a drying hot water tank, and a humidification device; the output end of the conveying fan is connected to the first input end of the heat exchanger, and the first output end of the heat exchanger is connected to the input end of the filter; the second input end of the heat exchanger is connected to a cooling water device, and the second output end of the heat exchanger is connected to the drying hot water tank; the output end of the filter is connected between the heat exchanger and the drying hot water tank; the output end of the humidification device is connected between the conveying fan and the heat exchanger.
[0006] In one possible implementation, an inverted U-shaped pipe is also included; the second output end of the heat exchanger is connected to the drying hot water tank through the inverted U-shaped pipe; and the output end of the filter is connected to the input end of the inverted U-shaped pipe.
[0007] In one possible implementation, an atmospheric pressure tank is provided at the top of the drying hot water tank.
[0008] In one possible implementation, it further includes a first pipe, a second pipe, a third pipe, and a fourth pipe; the conveying fan is connected to the first input end of the heat exchanger via the first pipe; the cooling water device is connected to the second input end of the heat exchanger via the second pipe; the second output end of the heat exchanger is connected to the inverted U-shaped pipe via the third pipe; and the filter is connected to the input end of the inverted U-shaped pipe via the fourth pipe.
[0009] In one possible implementation, sight glasses are also provided on the third and fourth pipes, and the sight glasses are configured to observe whether the drainage pipes are blocked.
[0010] In one possible implementation, a condensate pipe is also included; the condensate pipe is connected to the input end of the drying hot water tank and is configured to deliver the original steam condensate into the drying hot water tank.
[0011] In one possible implementation, the inverted U-shaped pipe is provided with a vent pipe, the vent pipe having a vent port configured to discharge compressed air from the pipe.
[0012] In one possible implementation, a first valve is provided on the second pipe; a second valve is provided on the third pipe; and a third valve is provided on the fourth pipe.
[0013] In one possible implementation, the vertex of the inverted U-shaped pipe is higher than the vertex of the first pipe.
[0014] One or more technical solutions provided in this application have at least the following technical effects: This utility model embodiment employs a pure water recovery system for a polymer drying secondary conveying humidifier, including a conveying fan, a heat exchanger, a filter, a drying hot water tank, and a humidification device. The output end of the conveying fan is connected to the first input end of the heat exchanger, and the first output end of the heat exchanger is connected to the input end of the filter. The second input end of the heat exchanger is connected to a cooling water device, and the second output end of the heat exchanger is connected to the drying hot water tank. The output end of the filter is connected between the heat exchanger and the drying hot water tank. The output end of the humidification device is connected between the conveying fan and the heat exchanger. It also includes an inverted U-shaped pipe; the second output end of the heat exchanger is connected to the drying hot water tank via the inverted U-shaped pipe; the output end of the filter is connected to the input end of the inverted U-shaped pipe. The conveying fan can convey pure water from the humidification device to the drying hot water tank through pressure difference, and this application also provides an anti-backflow structure for the inverted U-shaped pipe. This application solves the technical problem of excessive pure water waste caused by oversaturation humidification in the existing PVC resin pneumatic conveying system. It can safely recover excess pure water to the drying hot water tank for recycling, significantly reducing pure water consumption and eliminating system safety risks while ensuring the static electricity elimination effect. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of a pure water recovery system for a polymer drying secondary conveying humidifier provided in an embodiment of this application.
[0017] Icons: 1-Conveying fan; 2-Heat exchanger; 3-Filter; 4-Drying hot water tank; 5-Humidification device; 6-Inverted U-shaped pipe; 7-First pipe; 8-Second pipe; 9-Third pipe; 10-Fourth pipe; 11-Sight glass; 12-Condensate pipe; 13-Drain pipe; 14-First valve; 15-Second valve; 16-Third valve. Detailed Implementation
[0018] 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, not all, of the embodiments of the present utility model. 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.
[0019] In the description of the embodiments of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "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 the embodiments of this utility model and simplifying the description. They 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. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.
[0020] This utility model embodiment provides a pure water recovery system for a polymer drying secondary conveying humidifier, such as... Figure 1 As shown, the system includes a conveying fan 1, a heat exchanger 2, a filter 3, a drying hot water tank 4, and a humidifying device 5. The output end of the conveying fan 1 is connected to the first input end of the heat exchanger 2, and the first output end of the heat exchanger 2 is connected to the input end of the filter 3. The second input end of the heat exchanger 2 is connected to a cooling water device, and the second output end of the heat exchanger 2 is connected to the drying hot water tank 4. The output end of the filter 3 is connected between the heat exchanger 2 and the drying hot water tank 4. The output end of the humidifying device 5 is connected between the conveying fan 1 and the heat exchanger 2.
[0021] For example, the outlet pressure of the conveying fan 13BL-1204 when it is unloaded is 42 kPa. The overflow port height of the drying hot water tank 4 is set to 3300 mm, and the foundation is 400 mm. Then the static pressure generated by the highest water level of the hot water tank on the ground is 3700 mm water column, or 37 kPa, and the pressure difference is 5 kPa.
[0022] For example, the pure water output by the humidifier 5 is at a temperature of about 30°C, and the heat exchanger 2 can cool the gas output by the conveying fan 1.
[0023] In the embodiments of this application, such as Figure 1 As shown, it also includes an inverted U-shaped pipe 6; the second output end of the heat exchanger 2 is connected to the drying hot water tank 4 through the inverted U-shaped pipe 6; the output end of the filter 3 is connected to the input end of the inverted U-shaped pipe 6.
[0024] In the embodiments of this application, such as Figure 1 As shown, an atmospheric pressure tank is provided on the top of the drying hot water tank 4.
[0025] For example, the top of the drying hot water tank 4 is provided with an open atmospheric pressure tank, so the excess pure water after the secondary conveying and humidification can be discharged into the drying hot water tank 4 by wind pressure.
[0026] In the embodiments of this application, such as Figure 1 As shown, it also includes a first pipe 7, a second pipe 8, a third pipe 9, and a fourth pipe 10; the conveying fan 1 is connected to the first input end of the heat exchanger 2 through the first pipe 7; the cooling water device is connected to the second input end of the heat exchanger 2 through the second pipe 8; the second output end of the heat exchanger 2 is connected to the inverted U-shaped pipe 6 through the third pipe 9; and the filter 3 is connected to the input end of the inverted U-shaped pipe 6 through the fourth pipe 10.
[0027] In the embodiments of this application, such as Figure 1 As shown, sight glasses 11 are also installed on the third pipe 9 and the fourth pipe 10. The sight glasses 11 are configured to observe whether the drainage pipe is blocked.
[0028] For example, the drain ports of heat exchanger 23HE-1206 and filter 33FL-1206 are equipped with sight glasses 11, which facilitates observation of whether the drain line is blocked.
[0029] In the embodiments of this application, such as Figure 1 As shown, it also includes a condensate pipe 12; the condensate pipe 12 is connected to the input end of the drying hot water tank 4 and is configured to transport the original steam condensate into the drying hot water tank 4.
[0030] In the embodiments of this application, such as Figure 1 As shown, an air vent pipe 13 is provided on the inverted U-shaped pipe 6, and an air vent is provided on the air vent pipe 13. The air vent is configured to discharge compressed air from the pipe.
[0031] For example, the drain pipe is designed as an inverted "U" shaped pipe, which can prevent the hot water in the drying hot water tank 4 from flowing back when the conveying fan 13BL-1204 stops, and the vent can allow the system to discharge compressed air when draining.
[0032] For example, the vent is arranged at a downward angle of 45°, and an insect screen is installed at the outlet to prevent foreign objects from entering the pipe.
[0033] In the embodiments of this application, such as Figure 1 As shown, a first valve 14 is installed on the second pipe 8; a second valve 15 is installed on the third pipe 9; and a third valve 16 is installed on the fourth pipe 10.
[0034] In the embodiments of this application, such as Figure 1 As shown, the vertex of the inverted U-shaped pipe 6 is higher than the vertex of the first pipe 7.
[0035] For example, this application includes a differential pressure sensor between the outlet of the conveying fan 1 and the drying hot water tank 4. When the measured differential pressure is less than 3 kPa, an audible and visual alarm is triggered, and the second valve 15 and the third valve 16 are automatically closed. This arrangement can prevent backflow or stagnation of drainage due to insufficient air pressure.
[0036] For example, the height (H) of the apex of the inverted U-shaped pipe 6 and the height (H0) of the highest water level in the dry hot water tank 4 satisfy: H≧H0+300mm.
[0037] The various embodiments in this specification are described in a progressive manner. For the same or similar parts between the various embodiments, please refer to each other. Each embodiment focuses on describing the differences from other embodiments.
[0038] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit this application. Although this application 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this application.
Claims
1. A pure water recovery system for a polymer drying secondary conveying humidifier, characterized in that, It includes a conveying fan (1), a heat exchanger (2), a filter (3), a drying hot water tank (4), and a humidification device (5); The output end of the conveying fan (1) is connected to the first input end of the heat exchanger (2), and the first output end of the heat exchanger (2) is connected to the input end of the filter (3). The second input end of the heat exchanger (2) is connected to the cooling water device, and the second output end of the heat exchanger (2) is connected to the drying hot water tank (4); The output end of the filter (3) is connected between the heat exchanger (2) and the drying hot water tank (4); The output end of the humidification device (5) is connected between the conveying fan (1) and the heat exchanger (2).
2. The pure water recovery system for the polymerization drying secondary conveying humidifier according to claim 1, characterized in that, It also includes inverted U-shaped pipes (6); The second output end of the heat exchanger (2) is connected to the drying hot water tank (4) through the inverted U-shaped pipe (6); The output end of the filter (3) is connected to the input end of the inverted U-shaped pipe (6).
3. The pure water recovery system for the polymerization drying secondary conveying humidifier according to claim 1, characterized in that, The top of the drying hot water tank (4) is provided with an atmospheric pressure tank.
4. The pure water recovery system for the polymerization drying secondary conveying humidifier according to claim 2, characterized in that, It also includes the first pipe (7), the second pipe (8), the third pipe (9) and the fourth pipe (10); The conveying fan (1) is connected to the first input end of the heat exchanger (2) through the first pipe (7); The cooling water device is connected to the second input end of the heat exchanger (2) via the second pipe (8); The second output end of the heat exchanger (2) is connected to the inverted U-shaped pipe (6) through the third pipe (9); The filter (3) is connected to the input end of the inverted U-shaped pipe (6) via the fourth pipe (10).
5. The pure water recovery system for the polymerization drying secondary conveying humidifier according to claim 4, characterized in that, The third pipe (9) and the fourth pipe (10) are also provided with sight glasses (11), which are configured to observe whether the drainage pipe is blocked.
6. The pure water recovery system for the polymerization drying secondary conveying humidifier according to claim 1, characterized in that, It also includes condensate pipes (12); The condensate pipe (12) is connected to the input end of the drying hot water tank (4) and is configured to transport the original steam condensate into the drying hot water tank (4).
7. The pure water recovery system for the polymerization drying secondary conveying humidifier according to claim 2, characterized in that, The inverted U-shaped pipe (6) is provided with an air vent pipe (13), and the air vent pipe (13) is provided with an air vent, which is configured to discharge compressed air from the pipe.
8. The pure water recovery system for the polymerization drying secondary conveying humidifier according to claim 4, characterized in that, The second pipe (8) is equipped with a first valve (14); A second valve (15) is provided on the third pipe (9); A third valve (16) is installed on the fourth pipe (10).
9. The pure water recovery system for the polymerization drying secondary conveying humidifier according to claim 4, characterized in that, The vertex of the inverted U-shaped pipe (6) is higher than the vertex of the first pipe (7).