Vacuum system pipeline scaling ablation device

Abstract

The invention relates to the field of polyester production equipment, in particular to a vacuum system pipeline scaling ablation device which comprises an ablation sheet-shaped body, a plurality of disconnected structures are formed at one end of the ablation sheet-shaped body at intervals and extend towards the other end of the ablation sheet-shaped body, and hook-and-loop fasteners are arranged at the disconnected structures of the ablation sheet-shaped body and used for bonding the disconnected structures. A heating resistance wire is arranged in the ablation sheet-shaped body, a power supply module is arranged at the end part of the ablation sheet-shaped body, the power supply module is connected with an external power supply through a power line, a controller is connected to the power supply module, and the power supply module is electrically connected with the heating resistance wire. According to the vacuum system pipeline scaling ablation device, the portion, at the scaling position, of the pipeline is wrapped with the ablation sheet-shaped body, the controller controls the power module to provide power for the heating resistance wire, the ablation sheet-shaped body heats the pipeline, internal scaling is gradually ablated, operation is easy and convenient, scaling ablation is rapid, and the ablation effect is good. And the capability of the vacuum system can be effectively recovered.

Description

Technical Field

[0001] This invention relates to the field of polyester production equipment, and in particular to a device for descaling and melting scale buildup in vacuum system pipelines. Background Technology

[0002] The polyester vacuum system is a core process in polyester production, mainly used to remove byproducts during the polycondensation reaction stage to ensure efficient reaction.

[0003] The powerful suction of the vacuum system extracts small amounts of oligomers from the reactor, which gradually accumulate on the system pipe walls as the reaction proceeds. Over time, this accumulation reduces the pipe diameter, affecting the vacuum system's capacity and disrupting normal production. While traditional ethylene glycol thermal cleaning can remove some scale at fixed points, its effectiveness is limited. When high-temperature ethylene glycol is injected into the vacuum system pipelines, it is captured by the spray condensation system and cannot remain at the scale location, thus affecting the cleaning effect. Furthermore, injecting high-temperature ethylene glycol into the vacuum system reduces its capacity. Therefore, we propose a scale ablation device for vacuum system pipelines. Summary of the Invention

[0004] To address the shortcomings of the aforementioned technologies, this invention provides a scale removal device for vacuum system pipelines, enabling rapid removal of scale within pipelines and restoring the vacuum system's capabilities.

[0005] This invention discloses a scale removal device for vacuum system pipelines, comprising a scale removal sheet, one end of which has a plurality of disconnected structures and extends to the other end. Velcro is provided at the disconnected structures of the scale removal sheet for bonding the disconnected structures. A heating resistance wire is provided inside the scale removal sheet, and a power module is provided at the end of the scale removal sheet. The power module is connected to an external power source through a power cord, and a controller is connected to the power module. The power module is electrically connected to the heating resistance wire.

[0006] The ablation sheet includes a first protective layer, on which heating resistance wires are arranged. A temperature sensor is disposed between the first protective layer and the PI film layer, and the temperature sensor is electrically connected to a controller. Two PI film layers cover the first protective layer, with the heating resistance wires located between the two PI film layers. An aluminum foil reflective film layer is covered on the upper PI film layer, a heat insulation layer is covered on the aluminum foil reflective film layer, and a second protective layer is covered on the heat insulation layer. The first protective layer, the PI film layer, the aluminum foil reflective film layer, the heat insulation layer, and the second protective layer are combined into a single structure.

[0007] It also includes a WirelessHART gateway, which connects to the controller via an Industrial Internet connector and connects to the DCS control system via a wireless network.

[0008] Several binding straps are spaced apart on one side of the ablation sheet, and the binding straps are used to fix the ablation sheet to the pipe.

[0009] The present invention provides a vacuum system pipe scaling ablation device, which covers the scaling area of ​​the pipe with ablation sheet, and the controller controls the power module to provide power to the heating resistance wire. The heating sheet heats the pipe, causing the internal scaling to gradually dissolve. The device is simple and convenient to operate, and can quickly dissolve the scaling, effectively restoring the vacuum system's capacity. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of the present invention;

[0011] Figure 2 This is a schematic diagram of the internal structure of the ablation sheet of the present invention;

[0012] Figure 3 This is a schematic diagram of the heating resistance wire arrangement structure of the present invention;

[0013] Figure 4 This is a schematic diagram showing the connection between the present invention and the DCS control system. Detailed Implementation

[0014] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0015] Example 1:

[0016] like Figures 1-3 As shown, the present invention discloses a scale removal device for vacuum system pipelines, including a removal sheet 1. One end of the removal sheet 1 has a plurality of disconnected structures formed at intervals and extends to the other end. Velcro 2 is provided at the disconnected structures of the removal sheet 1 for bonding the disconnected structures. A heating resistance wire 13 is provided inside the removal sheet 1. A power module 4 is provided at the end of the removal sheet 1. The power module 4 is connected to an external power source through a power cord 5. A controller 7 is connected to the power module 4. The power module 4 is electrically connected to the heating resistance wire 13.

[0017] The ablation plate 1 is flexible and can be wrapped around the outside of the pipe according to its size. The power module 4 and controller 7 are existing known products, and their specific structures will not be described in detail. Velcro 2 is installed at the disconnection points of the ablation plate 1; alternatively, Velcro 2 can also be installed on both sides of the ablation plate 1. In actual use, the Velcro 2 is used to wrap around the pipe according to its size, ensuring a tight fit between the ablation plate 1 and the pipe. The power cord 5 connects to an external power source, and the controller 7 controls the power module 4 to provide power to the heating resistance wire 13, which generates heat. The ablation plate 1, wrapped around the scale buildup in the pipe, heats the pipe, thereby melting the internal scale. Depending on actual needs, the heating resistance wires 13 inside the ablation plate 1 can be arranged independently according to the disconnection points; that is, the heating resistance wires 13 within the ablation plate 1 between two adjacent disconnection points are independent and connected in parallel to the power module 4. The controller 7 can control each heating resistance wire 13 individually. In practical applications, a suitable width of ablative sheet 1 can be used to cover the pipe according to its size. Excess ablative sheet 1 can be left unused. The controller 7 can energize the heating resistance wire 13 within the ablative sheet 1 used for covering, and can also control the output power of the controller 7. Unused ablative sheet 1 can remain non-conductive, thus reducing energy consumption. This method of ablating scale inside pipes is simple, convenient, fast, and efficient. The disconnect structure uses Velcro 2 for connection. In practical applications, if there are instruments, valves, or other equipment on the pipe, the disconnect structure can be used to avoid them, allowing the ablative sheet 1 to better cover the pipe and improve ablative efficiency.

[0018] When used on large pipelines, multiple ablation plates can be connected together and wrapped around the pipeline for combined use, which makes it more versatile.

[0019] The ablation sheet 1 includes a first protective layer 11, on which heating resistance wires 13 are arranged. A temperature sensor 14 is disposed between the first protective layer 11 and the PI film layer 12. The temperature sensor 14 is electrically connected to the controller 7. Two PI film layers 12 are covered on the first protective layer 11, with the heating resistance wires 13 located between the two PI film layers 12. An aluminum foil reflective film layer 15 is covered on the upper PI film layer 12, a heat insulation layer 16 is covered on the aluminum foil reflective film layer 15, and a second protective layer 17 is covered on the heat insulation layer 16. The first protective layer 11, PI film layer 12, aluminum foil reflective film layer 15, heat insulation layer 16, and second protective layer 17 are combined into a single structure.

[0020] The heating resistance wire 13 is wrapped with two PI film layers 12 and connected to the power module 4 and controller 7 via wires. A temperature sensor 14 is placed between the first protective layer 11 and the PI film layer 12 it adheres to. The temperature sensor 14 is connected to the controller 7 and is used to feed back temperature data to the controller 7, allowing the controller 7 to better control the power and temperature of the heating resistance wire 13. The design of the aluminum foil reflective film layer 15 and the heat insulation layer 16 ensures that the heat generated by the heating resistance wire 13 is primarily transferred downwards, i.e., to the first protective layer 11, thereby allowing more heat to be used to heat the scale inside the pipe and improve heating efficiency. The second protective layer 17 protects the entire ablation sheet 1 to prevent damage during use.

[0021] Several binding straps 6 are provided at intervals on one side of the ablation sheet 1, and the binding straps 6 are used to fix the ablation sheet 1 to the pipe.

[0022] The strapping 6 allows the ablation plate 1 to wrap more tightly around the pipe, which can effectively reduce the large amount of heat loss caused by gaps due to the loose fit between the ablation plate 1 and the pipe, thereby improving energy utilization.

[0023] Example 2:

[0024] like Figure 4 As shown, the present invention discloses a vacuum system pipe scaling ablation device, which differs from Embodiment 1 in that it also includes a WirelessHART gateway 3. The WirelessHART gateway 3 is connected to the controller 7 through an industrial Internet connector 8, and the WirelessHART gateway 3 is connected to the DCS control system 10 through a wireless network 9.

[0025] In practical use, the scaling points in vacuum system pipes are often located in relatively specific areas. Technicians can use their experience to wrap ablative sheets 1 around these areas, keeping them in place. Therefore, the entire vacuum system typically has multiple ablative devices. To achieve automated control, the ablative sheets 1 are wrapped around the corresponding pipes, and the power cord 5 is connected to an external power source. The controller 7 controls the power module 4 to energize and de-energize the heating resistor wire 13. The DCS control system 10, a current technology, monitors the vacuum level of various parts of the vacuum system. If a local vacuum decrease is detected, it can pinpoint the location of scaling in the pipe, affecting the normal operation of the vacuum system. The DCS control system 10 can connect to the controller 7 via the wireless network 9, WirelessHART gateway 3, and industrial internet connector 8, and issue commands to the corresponding controller 7. The controller 7 then activates the power module 4, energizing the heating resistor wire 13 to generate heat, which heats the pipe, rapidly dissolving the scaling and clearing any blockages, thus greatly improving the operational stability of the vacuum system.

[0026] In the above solution, the DCS control system 10, controller 7, power module 4, wireless network 9, WirelessHART gateway 3, industrial internet connector 8, and cable ties 6 are all known products in the prior art. Their specific structures will not be described in detail, and those skilled in the art should know them.

[0027] Specific usage process:

[0028] (1) A vacuum system pipe scaling ablation device is wrapped around a vacuum pipe with scaling, and the ablation sheet 1 is fixed to the vacuum pipe by the strapping 6; the ablation sheet 1 is connected to each other by the Velcro 2, so that the ablation sheet 1 can be used on vacuum pipes with bypass or instruments.

[0029] (2) The ablation patch 1 is connected to an external power source via a power cord 5. After the power is turned on, the controller 7 displays the temperature detected by the temperature sensor 14 of the ablation patch 1. The controller 7 can individually control the power supply and output power of the heating resistance wires 13 at each part of the ablation patch 1 through the power module 4. The controller 7 can set the operating temperature of the heating resistance wires 13 at each part of the ablation patch 1. When the temperature of the temperature sensor 14 is lower than the operating temperature set by the controller 7, the controller 7 controls the power module 4 to increase the output power. When the temperature of the temperature sensor 14 is higher than the operating temperature set by the controller 7, the controller 7 controls the power module 4 to decrease the output power.

[0030] (3) The controller 7 can set the working temperature between 90-150℃, which can fully dissolve the scale in the vacuum pipeline. Studies have shown that scale can begin to dissolve when the pipeline temperature is 90℃, but the entire dissolution time is relatively long. When the pipeline temperature is 150℃, the dissolution time will be significantly shortened. However, the higher the working temperature of the scale dissolution device, the greater the impact on the vacuum system capacity. When using it, the dissolution temperature can be adjusted according to the vacuum system's capacity.

[0031] (4) The DCS control system 10 can connect to the WirelessHART gateway 3 through the wireless network 9. The WirelessHART gateway 3 is connected to the controller 7 through the industrial Internet connector 8, so that the DCS control system 10 can obtain the temperature data collected by the scale ablation device and control the scale ablation device to set the stable operation, start and stop of the device, and running time. The working temperature of the scale ablation device can be adjusted in a timely manner according to the real-time data of the vacuum system, avoiding frequent on-site adjustments by personnel.

[0032] (5) When the scale buildup area of ​​the vacuum system pipeline is large, the ablation efficiency can be improved by using multiple scale ablation devices in combination, avoiding poor results caused by scale buildup in one place; the WirelessHART gateway 3 can be connected to multiple scale ablation devices through multiple industrial Internet connectors 8, so that the DCS control system 10 can control multiple scale ablation devices simultaneously; when the size of the vacuum pipeline where the scale occurs is small, a portion of the scale ablation device can be used to ablate the sheet 1 to reduce energy consumption.

[0033] (6) When the vacuum system capacity is restored or the ultrasonic detection of the pipe scale disappears, the scale ablation device can be shut down; and the ablation device is installed in the vacuum pipe at the location most prone to scale formation, and the scale ablation device is periodically turned on through the DCS system to maintain the vacuum system capacity.

[0034] The beneficial effects of this invention are as follows: During normal polyester production, oligomer scaling in the vacuum system becomes increasingly severe as production progresses, gradually affecting the vacuum system's capacity and impacting normal equipment operation. This scaling ablation device can dissolve the scaling in the vacuum pipes within ethylene glycol, maintaining unobstructed vacuum system operation. This device is unaffected by the location, size, or extent of the scaling pipes, making it highly adaptable. It can be connected to a DCS control system 10 for remote control, achieving a high degree of automation. The device uses an aluminum foil reflective film layer 15 and an insulation layer 16 to reduce heat loss and energy consumption. Furthermore, the device can control the ablation temperature between 90-150℃, covering the optimal temperature range for scaling ablation, making it highly practical.

[0035] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application 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 application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" 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; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the interaction relationship between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simplification, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A device for descaling and dissolving scale in vacuum system pipelines, characterized in that: The ablation sheet includes an ablation plate with several disconnected structures at one end extending to the other end. Velcro is provided at the disconnected structures of the ablation sheet for bonding the disconnected structures. A heating resistance wire is provided inside the ablation sheet. A power module is provided at the end of the ablation sheet. The power module is connected to an external power source via a power cord. A controller is connected to the power module. The power module is electrically connected to the heating resistance wire.

2. The vacuum system pipeline scaling ablation device according to claim 1, characterized in that: The ablation sheet includes a first protective layer, on which heating resistance wires are arranged. A temperature sensor is disposed between the first protective layer and the PI film layer, and the temperature sensor is electrically connected to a controller. Two PI film layers cover the first protective layer, with the heating resistance wires located between the two PI film layers. An aluminum foil reflective film layer is covered on the upper PI film layer, a heat insulation layer is covered on the aluminum foil reflective film layer, and a second protective layer is covered on the heat insulation layer. The first protective layer, the PI film layer, the aluminum foil reflective film layer, the heat insulation layer, and the second protective layer are combined into a single structure.

3. A vacuum system pipeline scaling ablation device according to claim 1 or 2, characterized in that: Also includes The WirelessHART gateway connects to the controller via an Industrial Internet connector and connects to the DCS control system via a wireless network.

4. The vacuum system pipeline scaling ablation device according to claim 1, characterized in that: Several binding straps are spaced apart on one side of the ablation sheet, and the binding straps are used to fix the ablation sheet to the pipe.

Images